BIO-DEX SALT04 1 gal Bottle Salt Protect Scale Remover 4 per case. Salt Protect helps solve many common salt water pool issues by removing scale buildup on cells and preventing buildup with regular use. Salt Protect also removes organic stains and prevents them from returning. It's compatible with all sanitizers, acids and many common pool chemicals. It is stable and very effective, and is also a helpful tool for spring startup and the winterizing process.