This Pool Cleaning Tablets effectively guard against algae and other organisms. Enjoy crystal clear pool in this coming hot summer. Features: These swimming pool water sanitizers create a safer, cleaner, and more enjoyable swimming experience. Protectingagainst chlorine loss in direct sunlight while stabilizing them, reduces the amount of chemicals you need to add. Use 7 tablets per 2,500 gallons of water per week to achieve crystal clear pool water Eliminate harmful substances and controls algae in the water Purify water. No more dirty pool Products help yourfree from the hurt of sun's U-V rays Specifications: Package size: 150 * 150 * 100mm / 5.9 * 5.9 * 3.9in Package weight: 200g / 7.1ounce Packing List: 1 * Pool Cleaning Floating 1 bottle * Tablets