1Safe Material: Fish tank water purifying powder is safe, completely safe for water quality, aquatic organisms and surrounding plants and animals, made of organic materials, will not cause harm to fish. 2Improve Water Quality: Aquarium water purifying powder can effectively improve the water quality of the aquarium, while improving the water quality, it can also maintain the balance of the ecosystem in the aquarium, to ensure long term clear water quality. 3Excellent Effect: Utilizing the rapid coagulation of chemical positive and negative ions in the water, it achieves the excellent effect of clearing the water quality, suitable for water purification in any salt and freshwater ornamental fish aquariums as well as aquariums with aquatic plants. 4Effective Cleaning: Aquarium water purifying powder removes fishy odor, moss, and is harmless to aquatic plants, eliminating the trouble of frequent water changes in the aquarium for at least one month after use, and can make the water clear, green and bright. 5Suggestions for Use: It is recommended to use it twice a week and once every two weeks for regular maintenance, put it directly on the aquarium filter cotton, such as aquascape, place it in the filter cotton sandwich, put half a packet in 100CM aquarium, and put a packet in 150CM aquarium.Item Type: Aquarium Water Purifying PowderMaterial: Fast Cleaning PowderUse: Fish Tank Water Quality Cleaning and Algae Removal6 Boxesx Aquarium Water Purifying Powder (30 Packs)Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store