Deep cleans hidden, hard-to-reach areas in whirlpool tub circulation systems. Blasts away soap scum and body soil residue buildup. Clears grime and odor-causing mold, mildew and algae from pipes, pumps and jets. Easy to use: add one packet while filling tub with warm water; turn on jets and circulate water for five minutes; turn off jets and drain. 30 Packets per Case. 1-oz. Packet.