Hi Everyone! My tank seems to have a bit of a problem: brown algae is on some of the tank surfaces (not a lot, and it doesn't seem to be spreading). A little research told me that this algae is actually diatoms, which makes sense, since they brush off easily when I touch the surfaces. So, can anyone recommend a good algae-remover (copper-free, of course...I'm getting a bimac), or should I just wait this one out? Thanks.