Lofus, I'm afraid I don't understand what you're saying i.e. 2 times 6 does not equal 10 (nor does 2 times pi times 3 squared which would be the cross sectional area).... Can you elaborate and maybe provide a reference so I can read up on it too?
In my experience, multiple skimmers on a single system does not necessarily equate to a linear increase in "skimming power." I.e., two identical skimmers is not twice the skimming. One tends to outcompete the other. I once read a "tank of the month" or other "featured tank" (I think it was Richard Harker's) where he uses an air driven counter current skimmer as an indicator. I.e., when it starts producing skimmate he knows it's time to clean the other skimmer (I forget what the "other" skimmer was I think it was a large beckett style). Might have been in MFA 2002 where I saw this I'll have to check up on it.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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