What Chemicals to Close Above-Ground Pools?

20 minutes read

When closing above-ground pools, it is necessary to add certain chemicals to maintain the water quality and prevent algae growth during the winter months. These chemicals include:

  1. Chlorine: Before closing the pool, it is crucial to shock the water with chlorine to eliminate any bacteria or organic contaminants. This ensures the water remains clean during the winter season.
  2. Algaecide: Adding an algaecide helps to prevent the growth of algae in the pool. This is important as algae can stain the pool surfaces and make it more difficult to clean when reopening in the spring.
  3. pH balancers: It is essential to adjust the pH levels of the pool water before closing. This helps to prevent scale formation on pool surfaces and equipment. Balancers include pH increaser (sodium carbonate) to raise pH or pH reducer (sodium bisulfate) to lower pH.
  4. Stain and scale inhibitors: These chemicals help prevent the formation of stains and scales caused by minerals in the water. This is particularly useful in areas with hard water.
  5. Winterizing or flocculant chemicals: Adding a flocculant or winterizing chemical helps to remove fine particles from the water, making it easier to clean and restore clarity when reopening the pool.
  6. Algicide floaters: Algicide floaters are small devices that slowly release algaecide into the water over time. They help to ensure continuous protection against algae growth throughout the winter season.


Remember to follow the specific instructions provided by the manufacturers when using these chemicals. Additionally, make sure to remove any debris, clean the pool, and cover it properly to prevent damage during the winter months.

Best Above-Ground Pools of 2024

1
Bestway: Steel Pro MAX 15' X 48" Above Ground Pool Set - 4231 Gallon, Outdoor Family Pool, Corrosion & Puncture Resistant, Includes Filter, Pump, Ladder & Cover

Rating is 5 out of 5

Bestway: Steel Pro MAX 15' X 48" Above Ground Pool Set - 4231 Gallon, Outdoor Family Pool, Corrosion & Puncture Resistant, Includes Filter, Pump, Ladder & Cover

  • All ages will enjoy swimming and splashing all summer long in this 15-foot by 48-inch round above-ground pool; Includes a model 58388E 1,000-gallon filter pump, a ladder, and a pool cover
  • Built with a steel frame that is held together with FrameLink System to provide remarkable strength and connection
  • DuraPlus enhance 3-play PVC liner with an elegant design that provides a support band for additional stability to the pool wall for ultimate durability
  • Simple assembly and take-down process for off-season storage; No tools are required to connect the hose to the flow control valve to efficiently drain the pool water
2
INTEX 26355EH Ultra XTR Deluxe Rectangular Above Ground Swimming Pool Set: 18ft x 9ft x 52in – Includes 1500 GPH Sand Filter Pump – SuperTough Puncture & Rust Resistant – Easy to Assemble

Rating is 4.9 out of 5

INTEX 26355EH Ultra XTR Deluxe Rectangular Above Ground Swimming Pool Set: 18ft x 9ft x 52in – Includes 1500 GPH Sand Filter Pump – SuperTough Puncture & Rust Resistant – Easy to Assemble

  • EXPERIENCE THE ULTRA DIFFERENCE – Uniquely designed frame combines high quality galvanized steel with precision engineered locking system, enhancing the overall quality, durability and stability of the pools; 2 year warranty included for peace of mind.Age grade: 6+.Age Grading: 6+
  • EASY TO ASSEMBLE – Ready for water in just 60 minutes; Ultra XTR pools are designed with an Easy Lock System, making it easy to assemble; frame components simply snap together with no locking pins or additional tools needed
  • RUST RESISTANT – Encapsulated with inner and outer powder coating ensures the ultimate resistance to rust; the T-Joints are engineered for high strength and infused with UV inhibitor to ensure weather resistance and long service life
  • SUPER-TOUGH – Made with puncture-resistant 3-Ply PVC material, this pool is built to resist the wear and tear of summer fun; in case of any damage, a patch is included for easy fixes
  • KRYSTAL CLEAR SAND FILTRATION – The included Krystal Clear Sand Filter pump (#26643EG) provides excellent water filtration as the 6-function control valve allows the pool owner to: filter, backwash and rinse, recirculate, drain and close the system
  • REMOVABLE LADDER – The Ultra XTR pool includes a removable ladder that has a coated steel frame to prevent rust; Hi-impact steps for ease of getting in and out of the pool; included pool cover to keep debris out and ground cloth for added protection
3
Bestway Power Steel 24' x 12' x 52" Rectangular Metal Frame Above Ground Swimming Pool Set with 1500 GPH Sand Filter Pump, Ladder, and Pool Cover

Rating is 4.8 out of 5

Bestway Power Steel 24' x 12' x 52" Rectangular Metal Frame Above Ground Swimming Pool Set with 1500 GPH Sand Filter Pump, Ladder, and Pool Cover

  • All ages will enjoy swimming in the 24-foot by 12-foot by 52-inch above-ground pool set, including a model 58498E 1,500 GPH sand filter pump, a ChemConnect dispenser, a ladder, and a pool cover
  • Steel frame construction increases durability and is held together with Seal and Lock System to provide remarkable strength and connection
  • TriTech enhanced 3-ply PVC liner provides a reliable support band for additional stability to the pool wall for all summer fun
  • Simple assembly and take-down process for off-season storage with no tools required to connect the hose to the flow control valve to efficiently drain the pool water
  • Disclaimer: Please review your HOA rules and restrictions before purchasing the product; Not all housing agencies permit private above-ground pools
4
Bestway Power Steel 18' x 9' x 48" Oval Metal Frame Above Ground Outdoor Swimming Pool Set with 1500 GPH Filter Pump, Ladder, and Pool Cover

Rating is 4.7 out of 5

Bestway Power Steel 18' x 9' x 48" Oval Metal Frame Above Ground Outdoor Swimming Pool Set with 1500 GPH Filter Pump, Ladder, and Pool Cover

  • All ages will enjoy swimming all summer long in the 18-foot by 9-foot by 48-inch above-ground pool; Includes a model 58390E 1,500 GPH filter pump, a ladder, and a convenient secure pool cover
  • Built with a steel frame that is held together with Seal and Lock System to provide remarkable strength and connection
  • TriTech enhanced 3-ply PVC liner provides a support band for additional stability to the pool wall for ultimate durability
  • Simple assembly and take-down process for off-season storage; No tools are required to connect the hose to the flow control valve to efficiently drain the pool water
5
Funsicle 16ft x 48in Round Oasis Above Ground Pool, with SkimmerPlus Filter Pump & Ladder

Rating is 4.6 out of 5

Funsicle 16ft x 48in Round Oasis Above Ground Pool, with SkimmerPlus Filter Pump & Ladder

  • LUXURY POOL EXPERIENCE: Ideal for up to 8 people – Perfect for families, socializing & swimming
  • SIMPLE SETUP: SmartConnect poles with convenient snap-in design
  • MADE TO LAST: Ultra-strong oval metal frame with anti-corrosive matte finish & durable non-phthalates liner
  • 2-IN-1 SKIMMER PUMP & ESSENTIAL ACCESSORIES: Comes with SFX1500 SkimmerPlus Filter Pump (with GFCI) & type C filter cartridge. Includes deluxe maintenance kit, pool cover, ground cloth & repair patch
  • CLIMB IN & OUT: SureStep Ladder included for easy pool access
6
Funsicle 14ft x 48in Round Oasis Designer Above Ground Pool, Dark Double Rattan with SkimmerPlus Filter Pump & Ladder

Rating is 4.5 out of 5

Funsicle 14ft x 48in Round Oasis Designer Above Ground Pool, Dark Double Rattan with SkimmerPlus Filter Pump & Ladder

  • STYLISH LUXURY POOL: Perfect for families, socializing & swimming, with space for 6 to 7 people
  • SIMPLE SETUP: SmartConnect poles with convenient snap-in design
  • MADE TO LAST: Ultra-strong oval metal frame with anti-corrosive matte finish & durable non-phthalates liner
  • 2-IN-1 SKIMMER PUMP & ESSENTIAL ACCESSORIES: Comes with SFX1000 SkimmerPlus Filter Pump (with GFCI) & type C filter cartridge. Includes deluxe maintenance kit, pool cover, ground cloth & repair patch
  • CLIMB IN & OUT: SureStep Ladder included for easy pool access
7
Bestway Hydrium 15 Feet by 48 Inches Steel Wall Above Ground Swimming Pool Set with Accessories, Sand Filter Pump & Chemical Dispenser, Gray

Rating is 4.4 out of 5

Bestway Hydrium 15 Feet by 48 Inches Steel Wall Above Ground Swimming Pool Set with Accessories, Sand Filter Pump & Chemical Dispenser, Gray

  • Family-sized 15-foot by 48-inch round pool provides a place for kids and adults to enjoy summer fun
  • Ultra-durable galvanized steel wall, top platform, and supports provide superior rust and corrosion resistance
  • Embossed, textured woodgrain pattern on outer wall with realistic Prismatic Stone printing on the inner liner; Ultra-Violet coating protects liner from discoloration and cracking
  • Can stay assembled all year long without damage for seasonal convenience; Easy, 3-tool DIY setup; Screwdriver, wrench, and knife needed for assembly
  • Includes pool, sand filter, skimmer, ladder, ground cloth, pool cover, ChemConnect chemical dispenser
8
Funsicle 22ft x 52in Round Oasis Designer Above Ground Pool, Dark Double Rattan with SkimmerPlus Filter Pump & Ladder

Rating is 4.3 out of 5

Funsicle 22ft x 52in Round Oasis Designer Above Ground Pool, Dark Double Rattan with SkimmerPlus Filter Pump & Ladder

  • STYLISH LUXURY POOL: Perfect for families, socializing & swimming, with space for up to 11 people
  • SIMPLE SETUP: SmartConnect poles with convenient snap-in design
  • MADE TO LAST: Ultra-strong oval metal frame with anti-corrosive matte finish & durable non-phthalates liner
  • 2-IN-1 SKIMMER PUMP & ESSENTIAL ACCESSORIES: Comes with SFX1500 SkimmerPlus Filter Pump (with GFCI) & type C filter cartridge. Includes deluxe maintenance kit, pool cover, ground cloth & repair patch
  • CLIMB IN & OUT: SureStep Ladder included for easy pool access
9
INTEX 26339EH Ultra XTR Deluxe Above Ground Swimming Pool Set: 24ft x 52in – Includes 2800 GPH Cartridge Sand Filter Pump – SuperTough Puncture Resistant – Rust Resistant – Easy to Assemble

Rating is 4.2 out of 5

INTEX 26339EH Ultra XTR Deluxe Above Ground Swimming Pool Set: 24ft x 52in – Includes 2800 GPH Cartridge Sand Filter Pump – SuperTough Puncture Resistant – Rust Resistant – Easy to Assemble

  • EXPERIENCE THE ULTRA DIFFERENCE – Uniquely designed frame combines high quality galvanized steel with precision engineered locking system, enhancing the overall quality, durability and stability of the pools; 2 year warranty included for peace of mind
  • EASY TO ASSEMBLE – Ready for water in just 60 minutes; Ultra XTR pools are designed with an Easy Lock System, making it easy to assemble; frame components simply snap together with no locking pins or additional tools needed
  • RUST RESISTANT – Encapsulated with inner and outer powder coating ensures the ultimate resistance to rust; the T-Joints are engineered for high strength and infused with UV inhibitor to ensure weather resistance and long service life
  • SUPER-TOUGH – Made with puncture-resistant 3-Ply PVC material, this pool is built to resist the wear and tear of summer fun; in case of any damage, a patch is included for easy fixes
  • KRYSTAL CLEAR SAND FILTRATION – The included Krystal Clear Sand Filter pump (#26647EG) provides excellent water filtration as the 6-function control valve allows the pool owner to: filter, backwash and rinse, recirculate, drain and close the system
  • REMOVABLE LADDER – The Ultra XTR pool includes a removable ladder that has a coated steel frame to prevent rust; Hi-impact steps for ease of getting in and out of the pool; included pool cover to keep debris out and ground cloth for added protection


What chemicals should I use to keep the pool clean during winter?

To keep your pool clean during winter, you would typically need to use the following chemicals:

  1. Chlorine: Chlorine is the most important chemical for maintaining pool sanitation and killing any bacteria or algae in the water. You can use stabilized chlorine tablets, sticks, or granules during winter. Follow the instructions on the product packaging to maintain the recommended chlorine levels.
  2. Algaecide: Algae growth can still occur in a pool during winter, especially if it's not properly maintained. Using an algaecide specifically designed for winter conditions can help prevent algae growth and keep the water clear.
  3. pH and alkalinity balancers: It's crucial to maintain proper pH levels (7.2-7.8) and alkalinity levels (80-120 ppm) in your pool. Use pH increasers or pH decreasers to maintain the correct pH level and alkalinity increasers or alkalinity decreasers to keep the alkalinity within the recommended range.
  4. Stain and scale preventers: Winter conditions can lead to the accumulation of metals and minerals in the pool water, resulting in stains and scale formation. Using stain and scale preventers, which are usually sequestering agents, can help prevent these issues.
  5. Pool shock: Shocking the pool with a higher dose of chlorine periodically, especially after heavy rain or snowfall, is necessary to remove any contaminants, restore chlorine levels, and maintain water clarity.


It's essential to refer to the product labels and follow the manufacturer's instructions for dosage and usage. Additionally, consider consulting with a pool professional for more personalized advice based on your specific pool type and environmental factors.


What chemicals should I use to prevent scale buildup during winter?

There are several chemicals you can use to prevent scale buildup during winter. Here are a few options:

  1. Anti-scale water conditioners: These products are designed to prevent scale formation by changing the chemical composition of the water. They usually contain chemicals like polyphosphates, which sequester the minerals responsible for scale buildup.
  2. Descaling agents: If scale has already formed, you can use descaling agents to remove it. These agents typically contain acid-based chemicals like citric acid, vinegar, or commercial descalers. Follow the manufacturer's instructions for safe usage.
  3. Water softeners: Installing a water softener system can help prevent scale buildup year-round. These systems use salt or ion-exchange resins to remove the hardness-causing minerals from the water, reducing the likelihood of scale formation.
  4. Magnetic or electronic descalers: There are devices available that claim to prevent scale buildup using magnetic or electronic fields. These systems alter the precipitation of minerals, reducing their ability to form scale. However, their effectiveness may vary, so research and read reviews before investing in such products.


Remember to always follow the manufacturer's instructions when using any chemical or treatment to prevent scale buildup.


How to prevent pest infestations in and around the closed pool?

Preventing pest infestations in and around a closed pool is important to maintain cleanliness and prevent damage. Here are some steps you can take to discourage pests:

  1. Clean and remove debris: Remove any leaves, branches, or other debris that may have collected inside and around the pool. Clean out the skimmer basket and ensure that the drain is clear to prevent stagnant water from attracting pests.
  2. Drain water: If possible, drain the pool completely to eliminate standing water. Pests such as mosquitoes can breed in even small amounts of water, so eliminating their breeding grounds is crucial.
  3. Cover the pool: Use a high-quality pool cover that completely seals the pool. Ensure that the cover fits tightly and securely to avoid any gaps that pests may exploit to access the water.
  4. Maintain the surrounding area: Trim trees, shrubs, and grass around the pool area regularly. This prevents pests from using vegetation as a bridge or hiding spot to access the pool. Maintain a distance between plants and the pool to reduce the likelihood of pests reaching the water.
  5. Seal openings: Inspect the pool area for any small openings or gaps where pests can enter. Check for cracks in the pool structure, gaps in the fencing, or spaces around pipes and joints, and seal them with appropriate materials such as caulk, weatherstripping, or wire mesh.
  6. Remove food sources: Pests are attracted to readily available food sources. Ensure that no food or drinks are left near the pool area, and clean up any spills immediately. Store pool chemicals, cleaning supplies, and other potential attractants in sealed containers.
  7. Regular inspections: Keep an eye on the pool area and conduct regular inspections to identify any signs of pest activity. Look for droppings, nests, burrows, or any damage caused by pests. If you notice any signs, take immediate action to address the issue.
  8. Pest control measures: Consider using pest control methods such as traps, baits, or insecticides if necessary. Consult with a professional pest control service to determine the most appropriate and safe pest control measures for your situation.


By following these preventive measures, you can minimize the risk of pest infestations in and around your closed pool, maintaining its cleanliness and preventing any associated damage.

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