WhirlOut Spa, Hot Tub and Whirlpool Cleaner from Summit Brands. Eliminates soap scum & build-up from whirlpools. WhirlOut - Cleans pumps, pipes and surfaces in whirlpools, spas, hot tubs and jetted tubs. Fast & easy self-cleaning action safely removes soap scum & build-up, odors, bath & body oils, dirt and other system residue from inside of all pipes, pumps, fittings and the circulation system. Leaves acrylic, fiberglass, enamel and chrome surfaces fresh and clean without scrubbing. Regular use helps prevent buildup. 1.5 lb. package. CLEANING TIPS Please follow cautions and instructions on the label carefully. Follow the directions below after each use or after a period of inactivity. DO NOT USE WHILE BATHING. If unit has adjustable air/volume control, adjust to medium. Water level should be at least 2 inches above suction intake and highest jet. Note: WhirlOut is most effective when used with warm water. WHIRLPOOL/JETTED TUB: 1) After using tub and prior to draining, activate circulation pump. 2) Add 1/2 the container of WhirlOut ® near the suction intake. 3) Allow WhirlOut to circulate for 3-4 minutes. 4) Drain tub and refill, then circulate for 1 minute to rinse. 5) Drain tub. Repeat as needed. HOT TUB/SPA: Use prior to draining unit only. Follow JETTED TUB instructions, however, use the entire container and increase circulation time to 10 minutes.