We have many MDM pumps in operation here at the Monterey Bay Aquarium, from small, fractional horsepower Advance series pumps for low flow and low-pressure loops, up to the larger Genesys® series pumps for higher flow applications. The folks at MDM work closely with us to determine the optimal pump selection for each application. I find their communications are timely and thoughtful, their pricing is competitive, and in the event that a problem develops with a pump, they make it right.