Thanks UncleJed, I figured that's what it was. I was hoping there was an alternative to having surface motion. I pointed the 2 maxi jet 1200's with prop mods straight up. The surface is boiling now, just enough to it dosn't spill over. I didn't do this before because i was worried about salt creep. If it must be done ... salt creep is a reef keepers demon i guess. Thank you for the advice!