Leisure Time ALK-12 Alkalinity Increaser for Spas and Hot Tubs (12 Pack), 2 lb safety-knives or run on an in-line

or run on an in-line sander for faster completion on larger areas

Fits Zodiac Jandy CV Series cartridge pool and spa filter models CV340

Hayward DEX4820BTC Filter Head with Clamp System Replacement for Select Hayward Filters

3 in extension

Inside right chest pocket: 8

Leisure Time ALK-12 Alkalinity Increaser for Spas and Hot Tubs (12 Pack), 2 lb safety-knives or run on an in-lineLeisure Time ALK 12 Alkalinity Increaser for Spas and Hot Tubs (12 Pack), 2 lbCompatible With Chlorine, Bromine, Ozone And Biguanide SanitizersBalance Spa Alkalinity And Hot Tub Alkalinity To Prevent Ph Bounce And Other Spa Water ProblemsEffectively Raises Alkalinity LevelsNo Assembly Required