I'm in the process of cycling my little 5 gallon aquarium, the levels are already almost clear but the gravel is getting algae on it. How can I keep algae off the gravel? Is it safe to put a fish in (once the tank is done cycling) with algae on the rocks? Once I have a fish in there how can I keep the rocks from getting algae? I was thinking shrimp, a snail, or one of those little cory catfish but I don't want it to hurt my future fish (I really want a betta). Any suggestions?