Check the listing for details. Turtle Tank Filter 290GPH Low Water Adjustable for 20-85 Gal. Condition: New. Listed at 64.99 USD. With a flow rate of 290 GPH, it is ideal for freshwater, saltwater, and muddy water aquariums ranging from 20 to 85 gallons. The waterfall-style outlet promotes better water circulation and enhances oxygenation efficiency.