Note：1.Do not flush for the first three minutes until the bottom of the tank is fixed.2.Make sure the position is far away from the corner of water outlet and the water inlet to ensure the service time.3.Please store this product in a cool and dry place.How To Use:1.Open the package and tear the sealing rubber. When water level in tank is low, drop tablet into rear right corner of the tank.(Put it away from the outlet of the water tank) 2.It can flush after 5 minutes soaking. 3. When tablet has dissolved, replace with a new tablet.