Stinky, I just started my 2 ft tank. I am using undergravel filter with crushed coral. The overhead filter pump suck the water from the under gravel and then flow down thro' an elbow just above the water surface. (Undersatand this will provide turbulance on the water surface to get the oil/protein down?).

I have 4 kg of live rock and the water is cycled for almost a month. Now I added a Weipro venturi skimmer, 2012 hang on type. I have 6 damsels and a little crab.

My questions, I am getting alot of bubbles from the skimmer but no foam yet
. There is a water line mark on they cylinder, do I adjust to that line or above? How soon should I be seeing foams?

With this set up, what other advice can you offer?

Thank you