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An overflow box is a great way to keep the water level at a constant in your saltwater aquarium as well as increase the rate at which surface water, and the film and dust with it, is removed. CPR Aquatics are high quality, black acrylic and built in the USA. Install by using a bulkhead. Bulkhead size will determine your flow rate.
Large - up to 1200 GPH
RSS18DX - 12 1/2" L x 4 1/4" W x 5 1/4" H (Up to 200 Gallon tank)
