Fluval AquaClear Power Filter 20 is designed to support clean, healthy aquarium water. Pumps 100 gph. Recommended for aquariums up to 20 gallons. Quiet, efficient and reliable biological and mechanical filtration. Free Step 1 and Step 2 media are included in the box! The world's best selling aquarium power filters. Quiet, efficient and reliable biological and mechanical filtration. Fluval AquaClear 20 Aquarium Power Filter. Shop AquaClear aquarium filters, pumps and filter media at Uncle Bill's Pet Centers for trusted pet supplies and knowledgeable service in Indiana.