Rx Clear Winter Pool Closing Kits | Chemicals for Above or In Ground Swimming Pools | Up To 20,000 Gallons ALL IN ONE- This premium Rx Clear Winter Pool Chemical Closing Kit has everything you need to get your pool water ready for hibernation. Have an easy closing this winter, as well as a hassle-free opening in the spring! The Premium Closing Kit is suitable for pools up to 20,000 gallons. KEEP YOUR POOL SPARKLING - Rx Clear Winter Pool Chemical Closing Kits comes with stabilized chlorine tablets that are the best choice for an effective and economical pool maintenance program all season long. Ordering a larger winterizing kit than your pool size may help to protect against winter cover problems. LESS WORK - Adding pool closing chemicals to your water will help keep it clear and blue for the next season. Closing your swimming pool with the right winter pool chemicals can save you a lot of work when it comes time to open your swimming pool for the summer. Our powerful combination of winterizing chemicals help to prevent algae growth, eliminate minerals and metals that can cause liner stains and build-up, and purge lotions, oils, grease, and grime from your pool water. KEEP CONTROL- Prevents stains, scaling and brown water due to mineral build up. Rx Clear Winter Pool Chemical Closing Kits help keep control on iron levels and the levels of other metals in pool water. Using this kit helps stop corrosion of metal surfaces such as light fixtures, railings, ladders, screws, pool cover components, pool heater components, and metals in your pump or filter. TRUSTED POOL CHEMICALS - Maintain your swimming pool or spa with reliable pool chemicals and treatment supplies that you can depend on from Rx Clear. The Rx Clear brand is the premier choice for a trusted cleaning product to keep your pool in its best shape.