The Star System is a practical, self contained metering system. It comes equipped with the Blue-White C-1500 Injector of Your Choice - STANDARD, DELUXE or MICRO-FEED. The pump is mounted to a sturdy polyethylene tank in 7, 15 or 30 gallon capacity. A multi position opening in the tank lid makes adding chemical EASY. You can open, close or vent It. The tank has extra heavy wall thickness for added strength and stability.SpecificationGPD (gallons per day): 6.6Tank: 7 Gal