Hmmn, well my pepper corys are between 1.75 and 2.5 inches roughly, but how did we get onto peppers when the original tank has a pair of spotted corys?
I would think adding another cory to make it 3 spotted corys and a couple more bloodfins so you have 7 would be ok. As for a second schooling fish or a bigger fish I'd have to say you probably shouldn't. As for adding a bigger fish in your tank is questionable at best. You say you have 2 dwarf gourami in your tank already and if both are male they might get a bit pushy with each other as they get older as it is. They seem to like a bit of territory and if you add another fish of similar or slightly bigger size things would probably get worse from there.
Another suggestion would be that if you really want something a bit more substantial you could find your gourami a new home and bring home a couple (one male on female) ram cichlid.
I would think adding another cory to make it 3 spotted corys and a couple more bloodfins so you have 7 would be ok. As for a second schooling fish or a bigger fish I'd have to say you probably shouldn't. As for adding a bigger fish in your tank is questionable at best. You say you have 2 dwarf gourami in your tank already and if both are male they might get a bit pushy with each other as they get older as it is. They seem to like a bit of territory and if you add another fish of similar or slightly bigger size things would probably get worse from there.
Another suggestion would be that if you really want something a bit more substantial you could find your gourami a new home and bring home a couple (one male on female) ram cichlid.
