I tried running my bullet on an ampmaster3000 all on it's own. They aren't pressure rated and push 3000GPH plus. My MAK4 pushing 1100 GPH but is pressure rated runs the skimmer better.
With any pumps on a beckett skimmer you will notice a point where going up to a higher GPH pump doesn't make a drastic difference in bubbles produced.
The general consensus is that the Iwaki's(55 or 70) and the MAK 4 do the best job with a beckett skimmer. The pressure rating ensures a much higher water flow through the beckett at a higher speed pulling more air into the beckett to be mixed and chopped into bubbles.
I have also raised up the beckett on my bullet and it did make a difference in foam production. As well as increasing the diameter of the dia of the injector input to a 1".
My skimmer runs as a constant milk white out in the riser column. If I had known you were curious about this I would have shown you. I think I had the skimmer hidden behind a screen.
Here's that thread Doug was talking about.
pump talk.
[ 06 September 2002, 15:20: Message edited by: DJ88 ]