About this item Versatile - The chlorine tabs are perfect for above-ground swimming pools, hot tubs, spa, hot spring pools, even for toilets. Chlorine Tabs dissolve slowly and last up to one week Compatible With All Pools - Great for all pool types, including saltwater systems; Use 1" tabs for above ground pools. Use in floater, feeder, or skimmer basket (Floating Tablet Dispenser Sold Separate ASIN: B07193P5HZ) Long-Lasting Chlorine Tabs - Each tab is pre-stabilized against the sun's UV rays to prevent premature chlorine burn-off, making them last longer Saving Money - Having our chlorinating tablets, you don't need change the frequently, 1-tab helps you saving about 5,000 gallons of water Active Ingredients - Our pool tablets are pro-grade made from 99% Trichloro-S-Triazinetrione and 90% stabilized chlorine › See more product details