EcoTech MP20 Marine VorTech Water Pump with wave controller. The MP20 from EcEcoTech Marine has revolutionized reef aquarium propeller pumps. Ideally suited for aquariums smaller than 70 gallons, the MP20 produces unmatched broad yet gentle flow while placing the motor outside the tank—preserving the beauty of your aquarium and enhancing the health of your tank’s ecosystem. With all the electrical components outside the aquarium and a variety of easy-to-program modes, the VorTech is the safest, most versatile pump on the market. And, if your tank needs to grow, the MP20 can be upgraded to the MP40w (UPGRADE SOLD SEPARATELY) —providing you wireless communication between your pumps and even more functionality and flow. Operational Modes: Feed Mode - Slows down your pump for 10 minutes to allow you to feed your aquarium. Constant Speed Mode - The pump runs at a constant speed you set based on your aquarium’s specific needs. Reef Crest Mode - Simulate the high-energy conditions of a natural reef crest environment. Lagoon Mode - Simulate a calmer, lagoon reef environment. Optional Battery Backup - Keeps the circulation going during power failure for up to 30 hours. Specifications: Flow: 500-2000 gallons per hour. Power Consumption: 6-18 watts Maximum Motor Temperature: 50-60 degrees Celsius. Aquarium Wall Thickness Range: 3/16 inch - 3/4 inch. Appropriate Tank Size Range: 20-70 gallons. Dimensions: Wet Side- 3 inch diameter by 2.25 inches long, Dry Side- 3 inch diameter by 2.25 inches long. Clearance Needed Behind Aquarium: 3 inches.