Hello everyone. I've had fish for most of my life but I want to delve into something I'm not used to. I've had nono fish for the last twenty years or so. I also bred some Trophus and other Africans for a while. I have a 40-breeder sitting empty with everything I need to get it going. I would like to do larger fish in it. I was hoping to do Cupid cichlids in it. Again I'm totally new to this type of fish so please steer me in the right direction. Is this a good choice for this tank? If so how many? If not what would be? I chose this fish as I love Geophagus and have wanted to try them for years and thought this would be a good choice size-wise and temperament. Thank you for any help.