wolffam
Member
My 135 gallon tank has developed what I think will become a big problem. The surface of my tank is covered with a film of floating (trash, protein, etc). My skimmer boxes don't seem to be skimming the surface, but instead pull water from just below this film. Have two skim boxes, instead of having open slots that allow for the overflow of the surface into the box, it was set up with a series of drilled holes. By some odd chance the water level falls between the row of holes (they have two rows of holes going around.) Holes appear to be 1/4". Have two LFS, which conflict each other or coarse, suggesting fixes. Any suggestions?