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surface scum question
Hi everybody have a question about this 'white surface scum' on the surface
of my tanks
is it really necessary to get rid of it? what i mean is does it do any harm
to the plants or fish in my tanks? i have some fish breeding in my tanks
with teh surface scum and they seem to be very happy
although i do feed frozen blood worms/brine shrimp i think that causes to
the white layer..
or is it just a matter of appearence?
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