Convicts are easy to care for , very undemanding. They are aggressive and can be nasty at times. They mate like roaches if you get a pair. Will pair up quite easily. One of the best parents, will defend their young fiercely.
What kind of fish you thinking about puting these with? They tend to fight amongst themselves Let alone others.
I have convicts, way to many infact, I personally wish I had never purchased the original two. I have second ,third and fourth generation cons now. Mine mated and mated so on and so on, have had up to a 1000 or more ,all from two!!!! I have found that no one wants them either, found homes for about twenty. The rest turtle food ,and eight others spread through variuos tanks, and females kept alone for sure!!!!