BioGuard Optimizer helps the BioGuard brominating, chlorinating or biguanide programs work more efficiently. In addition to creating soft and soothing water, this product is proven to improve water clarity. It also softens water to skin and eyes. BioGuard Optimizer is stable in pool water and is not degraded by sunlight. The noticeable difference Optimizer makes to any pool will be the added sparkle, and Caribbean-like blue of the water. Swimmers will remark on how much more comfortable the water is.