Pool Shark Swimming Pool Chlorine Tablets - 3-Inch Chlorine Tablets - Slow-Dissolving 90% Active Chlorine Tabs - Pool Chemicals for Inground Pools, Above Ground Pools, Saltwater, Spa, Hot Tub (25 lbs)Brand: POOL SHARK Features: SLOW RELEASE CHLORINE FOR REGULAR MAINTENANCE Tired of constantly checking your pool's chlorine levels? With our slow dissolving 3 inch chlorine tablets, any pool will quickly benefit from the steady release over several days. Spend more time enjoying your pool, not maintaining it. 90% ACTIVE CHLORINE FROM 99% TRI CHLOR You want pool water that's crystal clear, smells fresh, and is safe to swim in. Our 99% trichloro s