Titania;1975785; said:Corys will definitely be fine. The Cardinals should, as well. The only thing you need to watch with small, quick betta tankmates is that they don't nip the betta's finnage.
I definitely agree. bottom-dwellers should be fine. I had my betta in with a few rummy-nose and bleed-heart tetras, and I think the bleed-hearts were the nippers. When I put my betta in, it had long flowing elegant fins like a evening gown you might say. it came out with a tore-up miniskirt =/
however, all is well!
(don't put them in with mollies, especially male) because both male fish have established hierarchies, where the male is the boss. they will flare up and clash.