Join Date: Oct 2010
Location: Victoria, Australia
Zebra danios need more than 10 gallons to be happy. They are an active schooling fish and can be quite boisterous. Most people actually tend to recommend a 3ft tank because of their swimming habits.
There are many small, peaceful species of rasbora and danio that can be used in a betta tank. You just have to look around to find them as not every mum and pop or chain store will sell them. I personally love microdevario kubotai. I had some in with my betta male and he never bothered them and they never bothered him. Depending on the individual temperament of your betta there are a whole range of fish that could be kept with him.
I had a very docile male and he used to live quite peacefully with some very tiny clown killifish. He only ever tried to eat them once when I put them in, and then after realising they were fish and not food he left them alone.