Maybe I'm "overskimming" but to be honest I don't see much difference in performance if I don't clean the neck every few days and let it go a couple weeks. I just dump the collection cup every 2-3 days and clean the neck every couple weeks.
Here's a statement from another board (also an active member here) which interests me.
Quote:
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It might (but have no data for it) turn out that dry skimming removes more sludge because the fisrt layer of sludge could might act as a sludge "magnet" removing relatively more sludge.
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I also tried isolating the skimmer pump in a internal sump container to take water direct from one tank's overflow. I did see an increase in larger particulates in the cup but not really any more "liquids".
SteveU