GLB Algae X is a long-lasting, non-foaming, multi-purpose polymer algaecide. It is effective over a wide pH range. This product has been proven not to harm liners or affect swimmer comfort. It is easier to prevent algae growth than to destroy established algae, Algae X does both. It's the economical, all purpose algaecide. This product is compatible with chlorine, bromine, ozone, salt water pools, and biguanide sanitizers.