Check the listing for details. Foam Free Super Defoamer for Hot Tub, Spa, Pool & Pond Anti-Foam - 2 x 16 oz.. Condition: New. Listed at 24.98 USD. Foam Free Super Defoamer for Hot Tub, Pool, Fountain & Pond - 2 x 16oz Bottles Foam Free instantly brings spa foam down -- the fastest and most effective hot tub defoamer you can buy. Use it whenever persistent foam is a problem, and to prevent new bubbles from developing in your spa. Ideal anti-foam for swimming pools, ponds & fountains too. A little goes a long way. Instantly brings spa foam down Concentrated formula Two 16 oz. bottles Product notes: Advanced formula helps prevent new foam from forming. Will not harm equipment, clog filters, or affect water balance. Two 16oz bottles for a total of 32oz.Foam Free Super Defoamer for Hot Tub, Pool, Fountain & Pond - 2 x 16oz Bottles Foam Free instantly brings spa foam down -- the fastest and most effective hot tub defoamer you can buy. Use it whenever persistent foam is a problem, and to prevent new bubbles from developing in your spa. Ideal anti-foam for swimming pools, ponds & fountains too. A little goes a long way. Instantly brings spa foam down Concentrated formula Two 16 oz. bottles Product notes: Advanced formula helps prevent new foam from forming. Will not harm equipment, clog filters, or affect water balance. Two 16oz bottles for a total of 32oz.