Hey Eric, i just read your email, apologies i have been really busy with NCEA.
ok, well firstly i would say no to the Sharks, the Owner musnt have a clue cause convicts can move bloody fast if they want to, you will most likley find dead sharks down the track. Yes they love planted tanks, i have mine in heavily planted tanks and i think that is the main reason for the success with breeding them. Although they do breed like rabbits mine were laying eggs every 6-7 days, and with plants it makes them feel more secure and happy, i spose, as with most fish.
I had my Convicts in a 160l tank with heaps of guppys and platys, gouramis, a single angel, a couple of lineatus, two pictus, 4 corys and a few bristlenose and never had a problem.
Shae