These were used in medium sized freshwater aquariums for a couple years, and saw brief use in a saltwater one as well. They have been sitting in storage for 12 years. They are unbranded but are identical to the Danner Mag-5 model pumps, rated at 500gph. I've tested both and they produce pretty hefty flow. You'll want at least a 50 gallon aquarium to handle this amount of flow or your fish are going to get tired. Or, use them to drive an external sump / filter tank. Located in Saanich (as of last week of February and onward) about 5min from uptown shopping center.