Spa Choice Foam Free shrinks foam on contact. Foam is a common problem in spas and hot tubs that is caused by many sources including: hair products deodorants lotions laundry soap residue spilt drinks and cheap or excessive chemical use. Foam Free is specifically designed for hot water application. Eliminates foam from your spa or hot tub quickly Designed For Hot Water Application Use as often as needed to prevent foam build-up Brand: Spa Choice Model: 472-3-2031 Dimensions: By Size Weight: By Size