Well my 5g tank has had an explosion of algae out of the blue. The tank is no where near where it can get any sun light and I don't have any live plants in it. All I can think that has happened is that I missed a spot of algae when I cleaned it out months ago and since it's being used again it decided to pop back up. Is there anything that can permanently get rid of the algae? It seems like nothing I do will work short of taking everything out and giving the tank and gravel a good cleaning. Though that's what I did before and now it's back again. Any suggestions?