As we all know, an unclean aquarium is harmful to the life of your fishes, this water purifier cube can solve the problems you faced, it can absorbs any dirt, bacteria or chemical that may be harmful to the health of your pet fishes. Easy to clean and use. This is a good helper for your life. Features: Honeycomb design, ultra-absorption activated carbon block, solid composition, no powder, no impurities, will not cause black water. Ultra strong filtration and absorption. Absorb contaminant, prevents water from producing odor, avoids the water from getting murky, significantly decreases the death rate of aquarium pets. Instead, their health level is increased in the process due to cleaner water. Simply put it in the tank! Just wash it with soap and warm water, and then you can put it back in the tank again. The water purifier cube will makes you feel calm and relaxed after a long day at work. Thus, this eco-aquarium water purifier cube is all you'll ever need. Filters and absorbs any dirt, bacteria or chemical that may be harmful to the health of your pet fishes. The adsorbed material is firmly controlled and oxidized to improve the filtration efficiency. Specification: Name: Water purifier cube Main material: Activated carbon Color: Black Optional size: 10*10*10cm; 10*10*5cm Note: It is not recommended to place the black mesh face up and down, causing blockage and affecting the filtering effect.?The honeycomb surface needs to be placed in the direction of water flow to filter more effectively. It is recommended to replace or rinse every 3-6 months. There could be a few deviation due to manual measurement or slightly color difference as the result of shooting scene. Package Information: Package size: 10.5*10.5*10.5cm Package weight: 10*10*10cm: 500g; 10*10*5CM: 250g Gift Box Packaging Package List: 1* Water purifier cube