Hot Tub Serum Total Maintenance Hot Tub and Spa Conditioner and Clarifier– 2 LiterPOWERFUL 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