Features: Helps prevent algae and increases water clarity. Provides a constant chlorine dose. Reduce the amount of algaecide and flocculant used. Contains cyanuric acid (stabilizer) so it will not be broken down by sunlight. Moves floating dispenser in 10 pieces of water per 4,500 gallons (1,000 liters). If you have an underground pool, put the tablet in the basket, it will easily melt faster in the water. NOTE: When using the pool, the floating water dispenser should come out of the pool. Do not put the plate directly into the sink, otherwise it will damage the inner pot. Specification: Quantity: 50 pieces/100 pieces/200 pieces optional How to use: Each 10 capsules contains 1000 kg of water, can be used directly with a watering can. About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.