Trusted pool cleaning experts in South Lake Tahoe California . Enjoy crystal-clear water with our debris removal, chemical balancing, and pool equipment inspection services for a stress-free swim.
Click Here To Call Us (877) 848-1711Maintaining a clean, safe pool is key to enjoying a refreshing swimming experience. At Spark Pool Cleaning, we offer expert pool cleaning services in South Lake Tahoe California ensuring your pool stays crystal clear and healthy year-round. Our team specializes in comprehensive pool care, including debris removal, filter cleaning, and algae prevention, all tailored to meet your pool's specific needs.
Our services in South Lake Tahoe California include thorough vacuuming, skimming, and brushing to eliminate dirt, debris, and organic buildup. We also provide water testing to ensure balanced pH, chlorine, and alkalinity levels, keeping your water clean and preventing harmful bacteria or algae growth. Additionally, we offer regular filter cleaning and pump maintenance, which helps extend the life of your pool equipment and ensures optimal performance.
Whether you're looking for weekly or bi-weekly pool maintenance, seasonal pool opening and closing, or one-time deep cleaning, our certified technicians in South Lake Tahoe California have you covered. Spark Pool Cleaning uses eco-friendly products and advanced techniques to maintain your pool while being mindful of the environment.
Trust Spark Pool Cleaning for dependable, high-quality pool cleaning services in South Lake Tahoe California . Contact us today to schedule your service and enjoy a pristine pool all season long.
Residential & commercial Pool cleaning
Quality services at affordable prices
Immediate 24/ 7 emergency services
Keeping your pool pristine is essential for enjoying it year-round, and one of the most frequent questions we receive at Spark Pool Cleaning is, "How often should I clean my pool?" The answer largely depends on various factors, including the pool’s usage, location, and environmental conditions in South Lake Tahoe California .
For most residential pools, a weekly cleaning routine is highly recommended. Regular maintenance helps prevent algae growth, maintains water clarity, and ensures that your pool equipment is functioning correctly. Weekly cleaning typically includes skimming debris from the surface, vacuuming the pool floor, brushing the walls, and checking chemical levels to ensure they are balanced.
In South Lake Tahoe California where weather conditions and pool usage can vary, it might be necessary to adjust your cleaning schedule. For instance, during periods of heavy use or after storms, you might need to clean more frequently. Leaves, insects, and other debris can accumulate faster, making it essential to keep an eye on your pool’s cleanliness.
Neglecting regular maintenance can lead to more significant issues, such as cloudy water, algae blooms, or equipment malfunctions. By adhering to a consistent cleaning schedule, you can avoid costly repairs and keep your pool in top shape. Spark Pool Cleaning offers comprehensive pool cleaning services tailored to your specific needs in South Lake Tahoe California . Our expert team ensures that your pool remains sparkling clean and ready for use at all times. For reliable and efficient pool cleaning, trust Spark Pool Cleaning to keep your pool in perfect condition throughout the year.
Residential & commercial Pool cleaning
Quality services at affordable prices
Immediate 24/ 7 emergency services
Algae can turn your once beautiful pool into a green nightmare within days. Our pool algae removal services in South Lake Tahoe California target algae growth with precision and effectiveness. Utilizing environmentally friendly products, our experienced technicians will carry out an extensive cleaning process that not only eliminates existing algae but also treats the water to prevent future outbreaks. We aim to restore the water's clarity and ensure a safe swimming environment for you and your family.
If your pool has turned green due to algae or other contaminants, our green pool cleaning services in South Lake Tahoe California will restore it to its former glory. Our skilled technicians employ a step-by-step approach to eliminate algae, balance chemical levels, and clean all surfaces thoroughly. We pride ourselves on using eco-friendly methods that are safe for you and your family, making our green pool cleaning service a healthy choice. Don’t let a green pool ruin your summer—reach out to us today for a quick and effective turnaround.
When your pool needs both cleaning and repairs, look no further. Our pool cleaning and repair services in South Lake Tahoe California provide an all-in-one solution to ensure your pool is not only clean but also fully functional. We are equipped to handle everything from minor repairs like replacing a skimmer basket to major issues such as pump or filter replacements. Our dedicated team will assess your pool's condition and provide you with a plan that addresses both cleaning and necessary repairs.
Emergencies can happen at any time, and when they do, you need a pool cleaning service that responds quickly. Our emergency pool cleaning services are designed to provide immediate assistance for unexpected pool issues. Whether it's a sudden algae bloom, debris from a storm, or mechanical failure, our team is on-call, ready to restore your pool to its best condition swiftly. We understand the urgency and are committed to providing timely and effective solutions whenever you need them.
Occasionally, you may need pool cleaning services on a tight timeline, and that’s where Pool cleaning comes in with our same-day pool cleaning services in South Lake Tahoe California . Our dedicated team can respond swiftly to your cleaning needs, ensuring your pool is ready for use on short notice. Whether it's a surprise gathering or a swimming event, you can count on us to provide prompt, professional service that meets your needs. Enjoy peace of mind knowing your pool will be clean and ready when you are!
Everyone's pool has unique requirements based on size, location, and usage. That’s why our custom pool cleaning packages allow you to tailor services precisely to your needs. From monthly service to weekly upkeep, we can create a package that suits your schedule and budget. Our flexible options empower you to choose the level of maintenance you need, ensuring your pool remains clean and inviting without exceeding your limits.
Water quality is paramount in pool maintenance. Our pool cleaning and water treatment services focus on ensuring that not only is your pool clean, but the water is healthy and safe for swimming. We conduct routine tests and adjustments to pH, chlorine levels, and other vital elements, preventing problems before they start. Our team utilizes the best water treatment practices, guaranteeing your pool remains a safe environment.
You shouldn’t have to compromise between affordability and quality when it comes to your pool. Our affordable pool maintenance services ensure that you receive top-tier care without stretching your budget. We offer a range of maintenance solutions that cater to every price point while maintaining high standards of service. Our commitment to keeping your pool in exceptional condition enables you to enjoy your swimming sanctuary year-round without financial strain.
Years Experience
Expert Technicians
Satisfied Clients
Compleate Projects
At Spark Pool Cleaning, we pride ourselves on delivering top-tier pool cleaning services across all cities in South Lake Tahoe California . Our commitment to excellence and customer satisfaction sets us apart in the pool maintenance industry.
Expert Technicians with Extensive Experience
Our team of highly skilled technicians brings years of experience to every job. We understand the unique needs of pools in South Lake Tahoe California and tailor our services to ensure your pool remains pristine year-round. From routine cleaning to complex repairs, our experts have the knowledge and tools to handle it all.
Cutting-Edge Technology and Eco-Friendly Solutions
We utilize the latest technology and eco-friendly products to keep your pool sparkling clean. Our advanced equipment ensures a thorough cleaning while minimizing environmental impact. At Spark Pool Cleaning, we are dedicated to using sustainable practices that protect both your pool and the environment.
Comprehensive Pool Care Services
Our services go beyond basic cleaning. We offer a full range of pool maintenance options, including water testing, chemical balancing, and equipment inspections. Whether you need a one-time deep clean or ongoing maintenance, we provide solutions tailored to your specific needs in South Lake Tahoe California .
Unmatched Customer Satisfaction
Customer satisfaction is our top priority. We work closely with you to understand your requirements and ensure our services exceed your expectations. With Spark Pool Cleaning, you can trust that your pool will be in the best hands.
Choose Spark Pool Cleaning for reliable, expert, and environmentally conscious pool maintenance across South Lake Tahoe California . Contact us today to schedule your service and experience the difference we can make.
Finding reliable and local pool cleaning services can sometimes feel like a daunting task. our team of experienced professionals offers comprehensive pool cleaning solutions tailored to meet your needs. With a focus on maintaining impeccable cleanliness, we utilize advanced techniques and eco-friendly products to ensure your pool water is crystal clear and inviting. Our local pool cleaners understand the unique climate and environmental conditions of South Lake Tahoe California allowing us to effectively combat any challenges. Choose us for reliable service, punctuality, and outstanding customer support that will keep your pool sparkling clean year-round.
In today's world, ensuring your residential pool is clean and well-maintained is crucial for your family's enjoyment and safety. Our residential pool cleaning service offers thorough cleaning procedures that eliminate contaminants, debris, and algae, transforming your pool into a crystal-clear oasis. We understand that every homeowner has unique needs, which is why we provide customizable cleaning packages tailored to your specific requirements. With a focus on eco-friendly practices, our expert technicians ensure that your pool is not only clean but also healthy for your loved ones.
When it comes to commercial pools, maintaining cleanliness and safety is crucial. Pool cleaning specializes in commercial pool cleaning services in South Lake Tahoe California catering to hotels, gyms, and recreational facilities. We recognize the unique requirements of commercial pools, providing tailored solutions that ensure compliance with health standards and guidelines. Our team works efficiently around your schedule to minimize disruption while ensuring your pool remains inviting and hygienic for your patrons. Trust us for high-quality service that enhances your business’s reputation.
When searching for the best pool cleaning companies in South Lake Tahoe California it is crucial to consider factors such as experience, customer reviews, services offered, and reputation. Our company prides itself on being a leader in providing exceptional pool cleaning services, combining expertise with personalized customer attention that sets us apart from the rest.
Here’s why we’re considered the best:
1. **Proven Track Record**: With years of operation and countless satisfied clients, our reputation speaks volumes. We achieve positive outcomes time and time again, proven by testimonials and reviews from happy customers.
2. **Wide Range of Services**: From regular maintenance to emergency clean-up services, we cover a comprehensive range of pool cleaning and maintenance tasks tailored to your needs.
3. **Highly Rated Staff**: Our cleaners are not only skilled but also trained in the latest pool cleaning technologies and methods, ensuring the best results without causing harm to your pool’s surfaces.
4. **Customer-Centric Approach**: We believe in putting our clients first. Our services are flexible, and we communicate effectively to assure you of transparency and trust every step of the way.
5. **Affordable Packages**: While we offer top-tier quality, we remain committed to affordability and value, offering some of the best pricing structures in the industry.
Choosing us means partnering with a company that has made a name for itself for excellence, integrity, and reliability.
A swimming pool is a major investment, and just like any asset, it requires regular care to ensure longevity and performance. Our pool cleaning and maintenance services provide an all-inclusive solution that keeps your pool crystal clear and always ready for use. Regular cleaning isn’t just about aesthetics; it’s about ensuring a safe, healthy environment conducive to fun and relaxation.
Here’s why our pool cleaning and maintenance services stand out:
1. **Preventive Care**: Regular maintenance helps prevent costly repairs down the road. Our cleaning schedules help identify issues early, protecting your investment.
2. **Expert Technicians**: Our trained professionals are equipped with the skills and tools necessary to effectively clean and maintain any type of pool to the highest standards.
3. **Tailored Service Plans**: We create personalized maintenance plans that fit your specific needs and budget, ensuring you get the exact services required to keep your pool healthy.
4. **Water Quality Management**: We specialize in water testing and treatment, precisely balancing chemicals to prevent algae growth, keep the water sparkling, and ensure a healthy swimming environment.
5. **Comprehensive Coverage**: Our services include not just cleaning, but also repairs, equipment checks, and operational assistance, ensuring every aspect of your pool’s maintenance is handled.
With our professional approach, you can rely on us for thorough pool cleaning and maintenance services tailored to keep your pool in pristine condition year-round.
Your pool is an extension of your home, and it deserves care that reflects your lifestyle. Our professional pool cleaning services in South Lake Tahoe California cater to homeowners and businesses alike, offering meticulous attention to detail and a commitment to excellence that ensures your pool remains a safe haven of relaxation and fun.
Here’s why you should choose our professional services:
1. **Trained and Certified Staff**: All our technicians undergo rigorous training and certification to ensure they can handle any pool type or size with expertise.
2. **Modern Equipment**: Equipped with the latest tools and technologies, our team can efficiently clean and maintain your pool, ensuring optimal performance.
3. **Customizable Services**: We recognize that every pool has unique needs. Our professional services can be tailored to fit your specific requirements, whether you need weekly cleanups or seasonal deep cleaning.
4. **Safety First**: We follow strict safety guidelines and procedures to ensure that your pool is clean and safe for you and your family or guests.
5. **Environmentally Friendly Practices**: Our methods focus on environmentally friendly products and procedures that protect not just your pool but our planet as well.
When you need a reliable partner for your pool's care, our professional cleaning services are your best choice for keeping your swimming space immaculate.
When it comes to professional pool cleaning services, our team stands out . We are dedicated to providing exceptional cleaning solutions tailored to both residential and commercial clients. Our professionals are certified, trained, and fully insured, utilizing the latest equipment and cleaning agents to ensure your pool is pristine and safe. With our keen eye for detail and commitment to excellence, you can trust us to maintain your pool to the highest standards, providing you with peace of mind.
A clean pool is a happy pool, and maintaining that cleanliness requires regular attention. At Pool cleaning, we offer weekly pool cleaning services in South Lake Tahoe California to keep your pool in tip-top shape. Our dedicated team is committed to thorough and efficient service tailored to your schedule. From debris removal to chemical balancing, we ensure that your water remains clear and safe for swimming. With our weekly services, you can enjoy your pool all season long without the hassle.
One of the most crucial elements of pool maintenance is ensuring that your filter is clean and functioning properly. Our pool filter cleaning services are designed to help you extend the life of your filtration system while maintaining crystal-clear water. A well-maintained filter not only ensures clean water but also increases the efficiency of your pool heating system, ultimately saving you money.
Reasons to choose us for your pool filter cleaning include:
1. **Expert Knowledge**: Our team consists of knowledgeable professionals who understand the inner workings of all types of pool filters, including cartridge, sand, and diatomaceous earth filters.
2. **Thorough Cleaning Process**: We meticulously clean and inspect your filtration system, ensuring it works optimally, effectively capturing contaminants and increasing water clarity.
3. **Preventative Maintenance**: Regular filter cleaning can prevent clogs and expensive repairs down the line, making this service an essential part of your overall pool care routine.
4. **Flexible Service Options**: We offer one-time deep cleaning or periodic scheduled maintenance to keep your filter in top condition so you can choose the option that best suits your needs.
5. **Quality Assurance**: We're dedicated to providing the highest quality services that leave your pool performing at its best.
With our pool filter cleaning services you can enjoy a refreshing swim in clean, clear water without the worry of water quality issues caused by a clogged filter.
A clean filter is essential to the overall health of your swimming pool, and our pool filter cleaning services ensure that your filtration system operates at peak performance. We specialize in deep cleaning of all types of pool filters to remove built-up debris and extend the lifespan of your equipment. Regular filter cleaning not only enhances water clarity but also reduces energy costs. Trust our experienced technicians to provide reliable and thorough filter maintenance, ensuring your pool water stays crystal clear.
The key to a pristine swimming pool lies in thorough vacuuming. Our pool vacuuming services in South Lake Tahoe California utilize state-of-the-art vacuuming equipment designed to remove dirt, leaves, and other debris from the pool floor. We offer both manual and automatic vacuuming options, ensuring that every corner of your pool is clean. By choosing our vacuuming services, you are investing in the preservation of your pool's beauty and hygiene, making swim time more enjoyable.
Ensuring your pool's water chemistry is balanced is crucial for both safety and enjoyment. Our chemical pool cleaning services include a comprehensive assessment of your pool's water chemistry, followed by appropriate treatments to bring levels back to optimal conditions. We utilize high-quality chemicals and are knowledgeable about eco-friendly alternatives to ensure that your pool is safe for everyone. Rely on our expertise to keep your pool not just clean, but also healthy for swimmers of all ages.
For comprehensive care of your swimming pool, Pool cleaning provides full-service pool cleaning in South Lake Tahoe California . Our all-inclusive packages cover everything from skimming and brushing to chemical treatments and equipment checks. This one-stop solution is ideal for busy pool owners who want to ensure their pool stays in top condition without the hassle. We pride ourselves on delivering thorough service that enhances your pool's longevity and usability. Choose our full-service package for ultimate peace of mind.
Swimming is one of the most enjoyable ways to relax and unwind, but a clean pool is paramount. With our swimming pool cleaning services we provide regular cleanings, emergency services, and tailored packages to ensure your pool is always ready for use. Our trained staff utilizes the latest technology and techniques to keep your pool water inviting and safe. We prioritize effective communication and customer satisfaction, guaranteeing your expectations are not just met but exceeded.
Your home's swimming pool is a sanctuary, offering enjoyment and relaxation right in your backyard. Our pool cleaning services for homes focus on delivering high-quality maintenance and cleaning tailored to each homeowner's unique needs.
Here’s why our home pool cleaning services stand out:
1. **Customized Services**: Everyone's pool is different. We offer tailored cleaning solutions addressing the specific requirements of your pool type and condition.
2. **Regular Maintenance Plans**: We provide flexible scheduling and regular maintenance packages to ensure your pool stays clean all year round.
3. **Health Focus**: We emphasize a safe swimming environment through regular chemical testing and precise adjustments to eliminate contaminants.
4. **Experienced Staff**: Our trained professionals have in-depth knowledge of pool equipment and chemistry, enabling them to tackle any maintenance issue effectively.
5. **Customer-Centric Commitment**: We prioritize your satisfaction, aiming to exceed your expectations with every service visit.
With our dedicated home pool cleaning you can rest assured that your personal oasis is in expert hands.
Pool tiles are often subjected to tough stains and buildup over time, affecting the overall appearance and cleanliness of your pool. Our specialized pool tile cleaning services focus on restoring the shine and cleanliness of your pool tiles, ensuring a beautiful swimming environment.
Why our pool tile cleaning services are essential for your space:
1. **Targeted Cleaning Techniques**: We employ effective cleaning methods designed specifically for tile surfaces, effectively removing stains, scaling, and tough residues.
2. **Expertise with Diverse Materials**: Whether ceramic or glass tiles, our technicians have the expertise needed to clean all types of pool tiles without causing any damage.
3. **Preventing Algae Growth**: Regular tile cleaning helps prevent algae and mold buildup, protecting both your pool and the health of swimmers.
4. **Restore Aesthetic Appeal**: Dirty tiles can diminish the overall look of your pool. Our services will restore your pool’s beauty, enhancing your backyard space.
5. **Comprehensive Solutions**: We don’t just clean tiles; we also provide additional maintenance checks to address any underlying issues.
Choose our pool tile cleaning services to keep your tiles looking new while making your pool experience safer and more enjoyable.
Algae can turn your dream pool into an unwanted green nightmare, posing health risks and diminishing the enjoyment of your swimming space. Our pool algae removal services are specifically designed to restore your pool to its pristine condition, using effective treatments to handle algae infestations of all sizes.
Why you should consider our algae removal services:
1. **In-Depth Analysis**: Our process starts with a thorough assessment of your pool, allowing our team to identify the type of algae and the extent of the infestation.
2. **Effective Treatments**: Our trained professionals use specialized chemicals and practices formulated to eliminate algae effectively while maintaining water safety.
3. **Preventative Measures**: After removal, we provide tips and services designed to prevent future algae outbreaks, enhancing the long-term health of your pool.
4. **Expertise You Can Trust**: Our team is equipped with the knowledge and tools necessary to tackle different algae types, from green to black to mustard algae.
5. **Revitalize Your Pool**: Our algae removal services aim to restore not only clarity and safety to your pool but also its overall aesthetic appeal for the upcoming season.
Don’t let algae ruin your pool experience; trust our experts for thorough and effective algae removal services .
Preventing algae growth in your pool is crucial for maintaining clean and inviting water, and at Spark Pool Cleaning, we understand the challenges pool owners face in South Lake Tahoe California . Algae not only tarnishes the appearance of your pool but can also lead to more severe issues if left unchecked. Here’s how you can effectively prevent algae from taking over your pool.
First and foremost, maintaining proper water chemistry is essential. Regularly test your pool’s pH, chlorine levels, and alkalinity to ensure they are within the recommended ranges. Algae thrive in imbalanced water conditions, so keeping these levels stable will create an environment where algae cannot easily grow. Aim to keep your chlorine levels between 1-3 ppm (parts per million) and pH levels between 7.4 and 7.6 for optimal results.
Another key factor is regular cleaning and circulation. Skim the pool daily to remove leaves and debris that can contribute to algae growth. Additionally, ensure your pool’s filtration system is running efficiently and clean it regularly. A well-maintained filter will help remove contaminants that algae use as a food source.
Shock treating your pool with a high dose of chlorine once every few weeks is also beneficial. This process helps to eliminate any algae spores before they can start growing. In South Lake Tahoe California where local weather conditions can vary, more frequent shock treatments might be necessary during warmer months.
Finally, consider using algaecides as a preventative measure. These products are designed to inhibit algae growth and can be a valuable addition to your pool maintenance routine. Spark Pool Cleaning offers expert advice and services in South Lake Tahoe California to keep your pool crystal clear and algae-free. Trust us to provide the best solutions for a healthy, algae-free swimming environment.
South Lake Tahoe is the most populous city in El Dorado County, California, United States, in the Sierra Nevada mountains. The city's population was 21,330 at the 2020 census, down from 21,403 at the 2010 census. The city, along the southern edge of Lake Tahoe, extends about 5 miles (8 km) west-southwest along U.S. Route 50, also known as Lake Tahoe Boulevard. The east end of the city, on the California–Nevada state line right next to the town of Stateline, Nevada, is mainly geared towards tourism, restaurants, hotels, and Heavenly Mountain Resort with the Nevada casinos just across the state line in Stateline. The western end of town is mainly residential, and clusters around 'The Y', the X-shaped intersection of US 50, State Route 89, and the continuation of Lake Tahoe Boulevard after it loses its federal highway designation.
Professional pool cleaning ensures proper chemical balance, extends equipment life, and keeps your pool safe and enjoyable .
You can easily schedule a service by contacting us online or by phone for all pool cleaning needs .
Yes, we provide pool closing and winterizing services to protect your pool during colder months .
Yes, we offer pool opening services at the start of the season to ensure your pool is ready for use .
Backwashing your filter should be done once a week or as needed to ensure proper water flow in your South Lake Tahoe California pool.
Yes, we offer minor repairs for pool equipment like filters and pumps. For larger repairs, we partner with trusted technicians .
Yes, we offer one-time cleaning services for special occasions or when your pool needs an extra deep clean .
We service filters, pumps, heaters, and chlorinators to ensure your pool equipment functions properly .
Yes, Spark Pool Cleaning offers winter pool maintenance services to ensure your pool stays clean during the off-season .
Our expertise, reliable service, and commitment to customer satisfaction make Spark Pool Cleaning the top choice .
Yes, we offer emergency pool cleaning services if you need immediate help with your pool in South Lake Tahoe California .
The cost depends on the size of the pool and the level of service. Contact Spark Pool Cleaning for a free estimate .
A typical pool cleaning service takes 1-2 hours, depending on the size and condition of the pool in South Lake Tahoe California .
Yes, Spark Pool Cleaning provides services for both residential and commercial pools .
We use high-quality, safe chemicals to balance your pool water and ensure it remains clear and healthy in South Lake Tahoe California .
Regular cleaning, proper filtration, and balanced chemicals are key to preventing cloudy water in South Lake Tahoe California .
We recommend weekly or bi-weekly pool cleaning services to ensure a clean, healthy pool in South Lake Tahoe California .
Spark Pool Cleaning offers regular cleaning, chemical balancing, filter cleaning, and equipment maintenance services in South Lake Tahoe California .
Yes, we provide cleaning and maintenance services for both chlorine and saltwater pools in South Lake Tahoe California .
We clean and inspect filters as part of our maintenance services to ensure proper water circulation and cleanliness .
Yes, we offer pool inspections to ensure the pool is in good condition before you purchase a home .
Yes, we offer pool draining and refilling services when necessary .
Regular pool cleaning includes skimming, brushing, vacuuming, chemical balancing, and filter cleaning in South Lake Tahoe California .
Regular cleaning, proper chemical levels, and good circulation are key to preventing algae in pools in South Lake Tahoe California .
Yes, we specialize in green pool cleanup, restoring your pool to crystal-clear condition in South Lake Tahoe California .
Yes, we offer stain removal services to restore the look of your pool's surfaces in South Lake Tahoe California .
Pool filters typically need to be changed every 3-5 years, depending on usage and water quality .
Cloudy water, excessive algae, or an unpleasant odor are signs that your pool needs a deep clean .
Yes, chemical balancing is included in our pool cleaning services to ensure safe and clean water .
We use specialized treatments and shock to eliminate algae and restore water clarity .
I’ve tried several pool cleaning services, and Spark Pool Cleaning is by far the best. Their service is professional and thorough, and our pool in South Lake Tahoe California always looks amazing!
Profession
Spark Pool Cleaning provides excellent pool maintenance. Their service is always thorough and reliable. Our pool in South Lake Tahoe California looks amazing every time they finish. Highly recommended!
Profession
We’ve been using Spark Pool Cleaning for months, and the quality of their service is unmatched. They handle everything with expertise and efficiency. Our pool in South Lake Tahoe California is always spotless!
Profession