The algae in my betta's tank is out of control. I wipe it off but it is just terrible. I have to keep a light on during the day because of my java fern, but the algae is taking over the tank - its the brown kind. I bought a snail, but he doesn't seem to be eating the algae. I think it is a giant ramshorn but I'm not sure. Can I add another snail without being stuck with a thousand baby snails? I tried an otto but the betta went at it like a guided missle. I had to put the otto in my 29 gallon (which also has an algae problem, but not as bad) Are there any kinds of snails that won't overpopulate at tank?