Material: Activated carbon. Contents: 1 aquarium filter Dimensions: Large 105 x 105 x 50mm: 1 aquarium filter for 300 liters of water. Function: water purification, deodorization. Dirty aquariums are harmful to the life of pets. Purify your aquarium water and keep your pets hygienic with these eco-cubes. Super absorbent activated carbon block. Solid ingredients, no powder, no impurities, no black water. Say goodbye to the hassle of constantly changing your aquarium water. Ultra-strong filtration and absorption: Filters and absorbs any dirt or chemicals that could be harmful to the health of your fish. Adsorbent materials are tightly controlled to improve filtration efficiency while extending cube life. Significantly reduces mortality in aquarium animals. Instead, their health improved with cleaner water. EASY TO USE: Just wash and dry, then put back in the tank. Your beautiful aquatic companion will make you feel calm and relaxed after a long day at work. Therefore, they must achieve