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Can't prove anything since I have no way to test but I moded my 30in Aerofoamer. It is 8in diameter x 10in tall main tube going into a 4in diameter x 10in tall top tube going into the collection cup. It has one beckett driven by an Iwaki MD 55 RLT. I drilled approximatly 20, 1/16th holes. I couldn't get any skimmate unless I ran the water level up to about 2 in from the top.
Now I get lots of dark skimmate running water level about 6 in from the top.
Does this make any sense?
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