Hot Tub Serum Total Maintenance Hot Tub and Spa Conditioner and Clarifier&ndash; 2 Liter POWERFUL CLEAN: One weekly dose with your existing sanitizer keeps your water system clean and clear LAST 4-6 MONTHS: Concentrated formula helps you keep your plumbing clean up to six months CRYSTAL CLEAR WATER: Water will look, smell and feel soft and silky. MULTI USE: Specially formulated to keep your hot tub, spa, jetted tub or whirlpool fresh SAVES YOU MONEY: Cut down on costly repairs and replacements with properly cleansed pipes jets and heater Add one teaspoon per 100 gallons of Hot Tub Total Cleanse to water. Run jets of high for 5-10 minutes to purge tub of bio matter and sludge Drain tub and wipe clean Refill hot tub To minimizebio matter build-up, add one capful of Serum Total Maintainance per 100 gallons approx. every 7 days Hot Tub Serum works with any sanitizer and is septic-tank safe