I will be keeping a close eye on them. Like I said, Some people have had them in there for years with no trouble and some will advise highly against it, not saying you fellows are wrong. I think it all comes down to weather or not the fish will deal with it. My 55 is heavily rock scaped with tons and i mean TONS of places for the cichlids/corys to hide. That might be one of the reason they don't bother them. I don't know. If they start to give the cories trouble I'll put them back into the 29g where they came from.