What made you switch to the MP20 I see in your list of equipment?
I wanted to get away from flow that was always in the same direction. That supposedly isn't the best for corals, which is one reason I added the Hydor Flo early in the game - to mix things up a bit. When I saw my first post of an MP20 in a 130 in another forum, I was sold on it, and the addiction overruled my brain and I ordered one. Expensive, but I've never been sorry that I got one. I still have the Hydor Flo going too, and that mixes up the current in the tank even more.