Zoo Med 511 Turtle Tank External Canister FilterContains biological, chemical and mechanical filtration. Clear viewing case allows you to see when filter media needs replacing. Turtle Tank External Canister Filter provides greater aeration with the included spraybar. Turtle filter features a removable hose-connecting device, easy to open filter head, adjustable flow control system and calibrated anti-vibration bushings. The turtle tank can be filled with 60 gallons of water maximum.