OLYCRAFT 2Pcs Aquarium Water Purifier Cube Filter 3.6x3.6x1.9 Inch Aquarium Water Purifier Cube Fish Tank Water Purifier Activated ​Charcoal Cubes for Fish Tanks Ponds Water Purification

Package and Size--The package includes 2pcs water purification cube, 98mm/3.6 inch long, 98mm/3.6 inch wide and 49mm/1.9 inch thick, it is a good choice for purifying fish tanks

Sponge Material--This water purification cube is made of sponge for good water purification, it can quickly capture particles and some pollutants in the water, easy to operate, ready to use

Cubic Honeycomb Structure--Adopting grid structure design, it can achieve super strong adsorption of impurities in water and maximise the adsorption capacity

Wide Application--Suitable for swimming pools, fish tanks and aquariums, creating a clear and healthy water environment for fish tanks and aquariums

Please Note--For best results, place it near the water intake of the pump, and to ensure that it cleans well, clear or replace it at regular intervals