Caribbean spa clarifier is a liquid formulation which increases your spas filtering efficiency. This product takes microscopic particles in the water and combined them together to form larger particles. These large particles are easier to remove from the water via the spas filter. This product can be added to your weekly spa care routine to help make the water look its best. It can also Be added to the spa to help restore clarity if the water is looking doll or cloudy. This product is compatible with youth in chlorine, bromine and biguinide sanitizing systems.