So I've been wanting to get some type of sucker fish since I started my tank, but I was going to wait until I actually had some algae growing in my tank. I have brown (almost redish) algae on the part of my filter where the water falls back into the tank, all over the filter media, and it's growing all over my plants. I also noticed it starting to grow all over the glass today. Is this bad algae or is this normal? Would getting a pleco or a cory cat be a good or bad idea? Do they add much to the bio load of a tank?