Hot Tub Supplies Spa Clear & Perfect, Filter Perfect, Cover Cleaner, Stabilized Chlorine Tablets, Balancing Chemicals, Algaecide Defoamers, Synergy System Kit 1″ Stabilized Chlorinating Tablets: Compressed 1”, ½ ounce chlorine tablets with no fillers and 90% available chlorine. For use in automatic chlorinators or floaters. Brominating Tablets: Compressed 1” bromine tablets. Totally soluble. Alternative to chlorine. For use in brominators. Crystal Clear Multi-Shock®: Multi-purpose shock keeps spa water clear and inviting. Includes pH buffers and clarifiers to make water sparkle. Add once a week to maintain beautiful spa water. Can use as soon as 15 minutes after application. Stabilized Chlorinating Granules 90: The strongest available chlorine in granular form. Unicel Replacement Pool Filter Cartridges: Mineral scale, rust and oils build up in most spa filters and are not completely removed by backwashing, causing filtration quality to deteriorate. Keep two complete sets of spa filter cartridges on hand to eliminate down-time and clean when time permits. Replacement filter cartridges are available in many sizes.