Hey hound. OK, I checked out the posts. The pump I was talking about is pretty similar. Just a little less wats and lpm but not much. How did you know how much to regulate the valve? What did you look for or what told you you had it with the right amount of air? My res is only about 3 1/2 ft away from my first module and I only have six modules altogether. The one you have is 35 watts 60 lpm and the one I was looking at is 20 watts 45 lpm. Thanks again hound, have a good one.