usually, I remember helping them research what he'd need. My ex had saw him at the store and wondered if they could put him in their big tank (only had a pleco, two angel fish and a school of 6 neon tetras). They concluded it could so they went and got one. It grew really fast and once the neons were all gone it started nipping everyone else's fins until it grew big enough to take out the angel fish one by one and then lastly it killed the pleco. Evil little thing. After that it refused to eat flakes. They starved it for two weeks before giving in a buying feeder goldfish :/
Feel free to message me any questions, I'll try to help the best I can!
Rummy- Mini Rex Rabbit
Diz jr- Betta
Yoshi- Crested Gecko