At, wiff regards to thick black skimmate...
im using a normal venturi skimmer...
its very difficult to get that dark skimmate....
furthermore, most of the bubbles would collapse at the foam riser...
the best i think i got was a rather wet foam,but with spots of blacks and browns....
is it suppose to be like that ?
or shd i let the thing run even longer ( the longest it was on was 2 weeks i think)