Perhaps, aren't molds a type of fungus? What would it be feeding off,
the protein layer on the surface?
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"C+J Tondreau" wrote in message
. ..
It almost sounds like a mold, doesn't it?

Jacqui

"NetMax" wrote in message
...
Does anyone have any experience with this? It's like a very fine
grey-green powder floating on the water surface. It appears quite
dense,
making very interesting patterns (grey-green swirls) when pushed by
the
filter output. If I touch my finger to the surface, it immediately
pulls
away leaving a clearing about 4" in diameter, so it's not very thick.

I'm not necessarily looking for a way to get rid of it as most of
these
funky algaes come & go without any intervention from me, but I was
trying
to collect some info, as I haven't seen this stuff mentioned before.
TIA
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www.NetMax.tk