Putting something in there can be pretty hit and miss when your breeding them. If you were going to, I'd stay as far away from bottom feeders as you can get. A small school of tetras, or rasboras would be ideal. When breeding, the males tend to take care of the brood, and get kind of rough with the female. Sometimes if there are other fish in the tank, it will spread the aggression around. Other times, the other fish will use the ram fry as a light snack, and munch them in the dark. Be careful what you choose, you might end up having to give them up later on. When the rams aren't breeding, they can go with just about any fish that won't eat them. Very peaceful fish! As for food, mine eat just about anything. But, if you want to get them in breeding condition, live baby brine shrimp, frozen blood worms, maybe even microworms, if they can find them, frozen brine shrimp, would all be good conditioners. Otherwise, mine for the most part, live on a variety of prepared foods. Lots of freezedried brine shrimp, krill, algae tablets, flake, shrimp pellets, that sort of thing.