Protects chlorine from the sun and helps to serve as a buffer for the pool materials and swimmers so the bleach isn't so harsh. Walmart has HTH brand stabilizer in a 4lb jug for about $17, but you can shop around in any pool section. Look for the major ingredient on the label - Cyanuric Acid. When you get it, post and we'll explain how to add to the water.What’s the stabilizer for? Is CYA a brand?
The link is at teh top of the page, but here it is: PoolMathIs there a calculator on how much bleach to add? When can I add? When can I swim after adding the bleach?