I'm thinking about getting a 180 gallon, but I'm not sure if I will because idk if I can get the fish I want for it. Could I put a fire eel, a fahaka puffer, and a stingray in it?
Dont know quite what you could keep the fahaka with. Practically nothing. THe fireeel and the stingray are peaceful so anything that wont hurt them and are too big to be eaten
Also... could i get a fire eel, a tiretrack eel, a stingray, and a bunch of types of knifefish (i know the same types arent good together, but what about different types?), and a couple of catfish?
I don't know how well it would work with a puffer but you could try putting very small fish such as tetras etc in with him when he's really big and the puffer might just ignore them because they are so small