Honestly they wouldn't do well in that tank, as the red eyes will usually nip them. Leaving them stressed which leads to diseases such as fin rot, etc, which are a pain to cure unless you have spotted them when they a developing. Also you are aware that Corydoras are schooling fish, right? and ideally should be in groups of 4+ for the larger species which I'm assuming that you have but that would max out you bioload so if you could take the Corydoras back then you could bump up the school of tetras making them feel more secure, and less nippy. They are magnificent in a nicely planted tank and show bright colors when in the perfect conditions, just watch out with space issues and make sure that you make a goal to upgrade there tank as red eyes don't show there full potential in smaller tanks as they don't have the space to swim and play as they would in a larger tank
Last edited by Mo; 03-15-2012 at 12:58 AM.