Pristiva Primer is a must-have in any salt water pool. It protects swimming pool equipment and finishes against scale, staining, corrosion, cloudy water and algae in salt water pools. It optimizes the performance of the salt chlorine generator while preserving cell life. And, it even enhances the water comfort and feel of a salt water pool due to isotonic advantage. Recommend this product for newly filled pools or converting a traditional chlorine pool to salt water, any pool switching to the Pristiva System from an existing salt water pool and for on-going salt pool maintenance (monthly).