Originally Posted by Lubeck
Your drain pipe is too far into the water cut it off until its 1" or 2 below the water... Make sure you have your water level correct before you cut. it does look like the water level is high. also do you have a hole drilled in that pipe? your drain pipe into the sump, does it have a hole drilled right above the water line? if not, this will help you to. both of those will help. I feel your pain, but you don't know what bubbles are till you see my tank. it took over a month to fix/figure it out. plus it is natural to some extent and will go away eventually.
Could almost have made a cheap skimmer out of that section. That's some serious froth....