Our fish tank water purification tablets contain water purifier and caloritin, effectively cleaning water quality, removing algae, deodorizing, and eliminating stains and sludge to keep your aquarium or fish pond clear. It quickly eliminates turbid substances in the water, ensuring a clear and safe environment for your aquatic pets. The gentle formula is suitable for fish, plants, and invertebrates, promoting a healthy ecosystem in the aquarium. Usage: When algae first appears, add 2-10L to the filtration system. Use continuously for 3-5 days, replace 1/5 of the water, and reapply. Start with a small amount for the first time. For severe algae, increase dosage by 2-3 times and use in small batches repeatedly. After 2 cycles of use, use every 7-11 days. Reduce dosage for small fish. After 3-5 days of use, the water quality will be significantly clearer—remember to clean the filtration system in time. These powerful tablets create optimal conditions to promote healthy fish growth, helping them thrive in a purified environment. Net Content: 35pcs; Gross Weight: 50g; Ingredients: Water Purifier, Caloritin; Packaging Size: 3.7*3.7*9.2cm; Product Size: 3.5*9cm; Shelf Life: 3 Years; Storage: Store in a cool and covered area