so I have a fully grown P. Tegulesi and I'm interested in comming it with other west african riverine spiecies, like various tetras, the big gabon shrimp and some smaller syno's as well as Phractolaemus ansorgii; which tops out at about 20 cm's. my general question is how small is too small when it comes to tankmates - without me having to go through the effort of digging it out of the tank and measuring it's mouth, so experiences, tips and sagely wisdom is most welcome, before i go through the effort to import what will end up being expensive food for my baby.