i mean that since the gourami is only like 2inches and so are the female bettas could i put two female bettas in there with him or not? it is going to have a lot of plants and plenty of hiding spaces so is this ok?
Zebra loaches would probably do fine with the gourami. I know skunk botia are quite aggressive, but I don't think Zebras are. My only concern would be size, as I don't know what size they get, so I don't know if they'd get too large for a 10g. MOst loaches do...
It depends on how fastidious you're willing to be about tank maintenance (water changes and the like). I'd not do any more than five though..., and you'd need to stay on top of things!