When I hear beta I assume you were keeping it in a small tank. The issue with bamboo shrimps is that they are filter feeders. They get all of their food from the water column. So you want to have a larger tank and very good water flow. They need to have places to sit and just filter feed, ideally directly in the outflow of your filter(s). I don't believe I've heard of anyone breeding them before, I'd assume their young require brackish water like with many shrimps. Pre-made food would be ok if it is in a powdered form. They wont be able to eat it otherwise. I've owned them before and they only lasted a few months. I don't think I had enough water flow for them; so learn from my mistake haha.