[slief]

Originally Posted by ReefClownMIA

Hendrik,

This skimmer is very large for your system size, sounds like you have a mid size bio load.
I'd bring it down to 8.5", run around 37w on the pump, and see if this will help., You're running the skimmer pretty dry, and may benefit from running it a little more wet.

I think his Supermarin uses the Red Dragon with the adjustable volute and not the RD3 pump. ReefID, please correct me if I am wrong. For his light load relative to the skimmer size, 9" is about perfect with the Red Dragon. In fact, I ran my SM250 with the RD3 in 9" of water for the first several months and it skimmed just fine too. I have since lowered it but my load is pretty heavy. In my experience, the lighter the load, the deeper the sump for that skimmer as he will need to skim wet to maintain the consistency. Judging by the foam collecting on the neck, it looks like it's set pretty well as it is. If anything, he could improve the skimmate output by closing the wedge slightly but that will result in wetter skimmate. The amount of skimmate isn't horrible for a small tank considering the SM250 has a pretty large diameter collection cup.