Hi, I'm in the process of setting up a new 90 galon saltwater tank. I was wondering what you guys though of using one of the new Vortech MP20's on it. I know it says up to 70 gallons on the specs, but the mp40 goes from 50 - 500+ gallons. That seems a little bit extreme and maybe over the top for what i would need in a 90 gallon. Any thoughts?