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Re: Surface scum

hmmmmm.... it's been my (limited) experience that surface scum is
directly related with surface agitation. if you're running a wet/dry
filter with an overflow collector you won't have any surface buildup.

if you're running a canister filter and trying very hard to minimize
surface disturbance to reduce CO2 depletion then you're going to get a
solid surface.

dropping an cheesy airstone in for five minutes will dissolve the
surface poop. i have yet to find a happy medium - no airstone, no
spraybar, no drilled tank - aaaggghhhh.