My other half has decided to close down her tank as she wants to concentrate on snakes How ever,she has asked me to keep a few of her favourite fish namely 2 peppered corys and a 2" plec (store says when full grown will only be 4").The trouble is i have a 8" shovelnose (sorubim lima)which i know will consider anything up to 3" as food,but will it bother trying to eat other catfish with their spiny fins.He is well fed and hasn't bothered any of his tank mates before but theres always a first time.Your opinions please