Hot Tub Serum Total Cleanse Hot Tub and Spa Cleaner &ndash; 2 Ounces DEEP CLEANS: Erase gunk and build-up as well as contaminants in spa plumbing MULTI USE: Specially formulated to keep your hot tub, spa, jetted tub or whirlpool fresh ECO-FRIENDLY: Gentle formula clears spa pipes without harsh chemicals for soft, silky water SAVES YOU MONEY: Cut down on chemical usage and costly repairs with properly cleansed pipes and jets PURGES 3 TIMES: Each jar allows you to completely purge your hot tub's water system up to 3X Add 1 teaspoon per 100 gallons of Hot Tub Total Cleanse to water Run jets on high for 15-20 minutes to purge tub of bio matter &amp; sludge Drain tub and wipe clean Refill hot tub To keep bio build-up from occuring again, add 1 capful of Serum Total Maintenance per 100 gallons approx. every 7 days. Hot Tub Serum works with any sanitizer and is septic-tank safe