beckzilla
Member
Have never gotten a complete answer to this so here goes.... on a ER in sump skimmer, what does the different levels of the overflow tube do to the efficiency of the skimmer. In other words if the tube is all the way down does it take out less crap then when it is up higher or all the way up. Also would raising the tube up higher in getting nitrates down even a little. And what is the normal position heigth for normal skimming.