Ok this is my dillemma I have a 3g and a 5g with one male betta each and have noticed algae on the gravel and glass of the aquariums. I do wipe it off when I do a PWC but it grows back. Since I can't put a algae eater in with the betta in fear it would kill it how do I get rid of the algae? On the glass it looks green on the gravel brown.:help: