Spa Frog Mineral Spa Care contains a patented mineral formula that destroys bacteria while neutralizing acids, which helps keep the ph in a safe range with less monitoring.  Using Frog Minerals with reduced levels of bromine or chlorine improves spa pleasure by reducing the irritations associated with bromine or chlorine, including red stinging eyes, dry itchy skin, faded bathing suits, premature damage to spa equipment or surfaces and smelly odors.  This product must never be used alone but always supplemented with a source of bromine or chlorine.  Replace Spa Frog every four months when draining and refilling your spa.