Shrimp seem to be the best option. In searching for detritus/algae eaters, the red cherry shrimp seem to come out on top b/c they can eat algae, but not the entire plant, and they have little bioload (so I've read by people selling the shrimp).
The 1 problem: bettas think they are FOOD, which they are. I put 12 1/2" shrimp in with my 29-gallon sorority.... maybe they're still there, but I haven't seen one in 3 weeks:0( I tried ghost shrimp- they disappeared even faster.
My solution is to start a RCS farm. I've got a 5 gallon tank, a sponge filter, 12 shrimp, and I'm setting it up now. My goal is to let any babies grow to a point where they won't be eaten, then tranfer them to my larger tanks (w/o being eaten, I hope). I wonder if this will work?
In the mean time, I'm experimenting w/ the oto catfish. I have 3 in with 1 male. They are tiny and can hide/swim fast; when Butch goes to check them out, they disappear! They are adorable and I want to get more. They do not acclimate well; I had to buy 5 to get 3 that are still alive. :0(
Last edited by Xaltd1; 03-11-2013 at 05:30 PM.