Protect your swimming pool against bacteria, algae and other organisms and enjoy clean, clear pool water with these convenient one-dose tabs. Sun protected for longer chlorine life, HTH 3-In Chlorine Tabs Advanced dissolve slowly and last up to one week. HTH Chlorine Tabs Advanced are great for all pool types, including vinyl-lined pools and salt water systems. HTH Swimming Pool Advanced Chlorine 15.0 Pound(s) Bucket 3-in Tablets Chlorine | 42054