I was thinking of emerald catfish also. I know these guys are much bigger though. I have 9 bronze cories in my 55g. Do you think I get get 4-5 emeralds without over crowding the cories? The 9 cories are the only bottom feeders in the tank.Pepper cory
There was one at the office that was wallowing in water that had not been changed in months, over 80ppm nitrates, hardness was in the high teens, gravel substrate being picked on by a small school of serpae tetra until his fins were just nubbins. I moved him to another tank and he is healing well so I would have to say that he did more than just survive.
The salt and pepper cory are similar, dGH to 15, temps up to 79F, pH 7.2.
I skipped corys initially due to the lower temperature tolerance and the softer water requirements and opted for emerald catfish instead, harder water, higher temps but ended up with a few pepper corys due the aforementioned fellow and a few extras I bought to bring the peppers up to 4 in the catfish grouping.