White Slime

[kien]

Originally Posted by RenHoek104

one said it's a sponge and the other has no idea, but told me the lack of live rock is probably a problem.

It is hard to make a definitive call on what it is without a clearer picture. To me it looks like it could be the start of a white sponge colony. I have rocks that started this way and over time the sponge got thicker. However, when it starts out it can look like a thin white slime coating. Sponges are good by the way. The help take up nutrients.

Also, you don't seem to have a very large bio load so your live rock should be fine. It should be more than enough to support your one fish and a few invertebrates. Or do you have more fish in there?

Anyway, if you don't like the white "Junk" then brush it off and suck it out of your tank. Otherwise I wouldn't panic. :-)