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. ? Specification:? Name: Water purifier cube Main material: Activated carbon Color: Black Optional size: 101010cm; 10105cm 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: 10.510.510.5cm Package weight: 101010cm: 500g; 10105CM: 250g Gift Box Packaging Package List: 1* Water purifier cube