there are definatly algae somethings. my 30, for the longest time, had green algae on the glass. then it had hair algae all over. now it has little puffs of beard algae on a few piece of gravel and basically no other algae.
my 50 gallon had hair algae the first month or so that it was set up. then it was prestine clean untill the black beard algae got ahold. now its ravaged with beard algae and my grass is suffering. I also have some fur algae, might be the same thing as BBA but green, and Im waiting it out.