bits of dust floating at the top of the surface

twig

AC Members
Apr 28, 2006
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I have like ... Well, it looks like dust that's been floating at the top of my surface now for a couple days. What the hell is that?! =( Why do I have it?

My tank has been cycled. It's been well-established for a couple months and i've only started getting this now =(

What does it mean?
What can I do?

I was thinking of skimming a paper towel at the top.
 
Or submerging a cup slowly and horizontally to diagonally, will suck the top layer of water in. Is it oily looking? it is it oily that is usually caused by commercial fish food.
 
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