And that is determined/removed howPerhaps you have an abundance of surfactant in your tank water? I've used brand new filter socks without rinsing them first and my skimmer (not a BM) goes crazy for a few hours lol.
I have a Curve 7 with the DC pump in my frag tank sitting in 8" of water that's never done what yours is doing...so???
Normally a brand new skimmer won't hardly make any foam at all, that's why I suspect some type of surfactant in the water.
