This unique one-of-a-kind dosing pump is designed to pump water up to 30" high and at a flow rate of 3-1/2gals per hour. Ideal as a dosing pump for reef additives, top offs, drip systems for reptiles terrariums and as a circultating pump for gravity fed siphons. Also a must for CPR's CS overflows, to pull air out of the overflow. ETL (UL) listed. Convenient Holder, (sold separately), secures the Aqua Lifter to the tank frame allowing for the tubing to be held in place.