Applied Biochemists No FoamApplied Biochemists No Foam lets you quickly and easily remove annoying foam buildup from your pool or spa water, restoring your pool to its former beauty. Its liquid formula can be added directly to the pool water, and has no effect on overall water chemistry to avoid any re balancing. No Foam can also be applied to your cartridge filter to prevent future foaming. Best of all, No Foam is fully compatible with chlorine, bromine, and bigaunide