Hi emma i had a pair ov keyholes in a comunity tank and they showed no aggresion whatsoever. They were a beautiful addtion to my tank !great pics, not sure about the plastic pipes though, i'd be tempted to cover them with silicon and gravel to make them blend in more. How do you find the keyhole cichlids aggression wise? i'm tempted to try some but worried about them eating the smaller tetras.
Emma