AquaDoc Hot Tub Defoamer - Spa Defoamer for Hot Tubs - 64oz - Spa Anti Foam to Keep Foam Down - Made in USABrand: MAV AquaDoc Features: Getting more hot tub foam than you bargained for? Spa foam is typically caused by soaps, oils, and cosmetics that naturally enter hot tubs during regular use. Spa jets disturb these contaminants, which results in more foam. The Spa Anti Foam that Works Fast AquaDoc's hot tub foam eliminator works quickly to reduce hot tub foam caused by soaps, oils, and cosmetics. Use it regularly to keep the spa foam down and enjoy a foam