Features: Helps prevent algae and increase water clarity. Provides a consistent dose of chlorine. Reduces amount of algaecide and flocculant you are using. Contains cyanuric acid (stabilizer) so it is not degraded by sunlight. Place the dispenser floating in 10 pieces of water every 4,500 liters (1,000 liters). If you have an underground water pool, put the tablets in the basket and it is easy to melt into the water at a faster rate. Note: When you use the pool, the floating water dispenser must come out of the pool. Do not place the plates directly in the pool as they will damage the liner. Specification: Quantity: 50 pieces Usage: For 10 particles containing 1000 kg of water, use with a watering can, you can use it directly. Includes: 1 bag (50 pieces) x chlorine tablets