I have some algea on my glass that looks like green spot algea, only it's not green. It's actually more brown looking. It's also on the decorations a little bit. I have a few ghost shrimp and a rubbernose pleco in the tank, but neither of them seem to touch it. Aside from taking the tank apart and scrubbing it out(which is what I did last time I had this problem), what can I do to get rid of it? Will anything eat it?