Our fish tank water purification tablets contain water purifiers and polycoagulants. It can quickly eliminate the turbid substances in the fish tank water, ensuring a clear and safe environment for your aquatic pets and keeping your fish tank clear and transparent. This formula is gentle yet effective, suitable for fish, plants and invertebrates, promoting a healthy ecosystem in aquariums. Its usage method is very simple: When algae first appear, add 2 capsules to 10L of water in the filtration system. After continuous use for 3 to 5 days, replace 1/5 of the water and add again. For the first time, use small amounts frequently. When algae are severe, increase it by 2 to 3 times appropriately. After using it for two cycles, it can be used once every 7 to 11 days. For small fish, be sure to reduce the amount used. After 3 to 5 days of use, the water quality will be significantly clear and bright. The filtration system should be cleaned in time. And by using powerful aquarium water purification tablets, you can create the best conditions to promote the growth of healthy fish, allowing them to thrive in a purified environment. sku:219670470314