The HTH 3" Individually Wrapped Chlorine Tabs Advanced are a game-changer for pool owners who want to keep their pool water crystal clear and healthy for swimmers. With one easy and convenient tablet, you get a sanitizer, clarifier, and algaecide, protecting your pool and swimmers. This advanced formula is designed to sanitize, clarify, and kill algae for beautiful and clean water all season long. The slow-dissolving, long-lasting formula is sun-protected for longer chlorine life, dissolving slowly and lasting up to one week. These tabs are compatible with all pool types, including vinyl-lined pools and saltwater systems, and can be used in a floater, feeder, or skimmer basket. For best results, use HTH 6-Way Test Strips twice weekly to test and balance your swimming pool water and keep chlorine levels between 1 and 4 ppm. With HTH, you're all clear!