Turtle Clean External Canister FilterProduct Description Turtle Clean External Canister Filter Ingredients Key Features External canister filter for turtle tanks, vivarium, box turtle pools or turtletubs up to 30 gallons. Double filtering system with internal biological recirculation. Comes complete with spray bar, mechanical filter, sponge, biologically active ceramic media and activated carbon. Adjustable flow control system. Calibrated anti vibration bushings. Easy to open filter head.