Features: Helps prevent algae and increase the clarity of the water. Provide a constant chlorine dose. Reduce the amount of algaecide and flocculant you use. Contains cyanuric acid (stabilizer) so it is not degraded by sunlight. Place the floating dispenser in 10 pieces of water every 4,500 liters (1,000 liters). If you have a groundwater pool, put the tablets in the basket and it is easy to melt in the water at a faster rate. Notice: When using the swimming pool, the floating water dispenser must come out of the pool. Do not put the plates directly into the pool as they will damage the liner. Specification: Quantity:50 Pcs Usage: For every 10 particles containing 1000 kg of water, use with watering can, you can use it directly. includes:1 Bag(50 Pcs) x Chlorine Tablets2 grams per tabletThe picture is for reference only, the actual size is not so big