How to stock new tank

[Conureparrot]

Hey, im going to get a 120 gallon or 125 gallon tank and am deciding how to stick it. I will either do brackish or fresh. If I do brackish, which puffer would work well with archers? Can I also have fiddler's? What about muskippers? What other fish may be good additions? For fresh, I am thinking about a bichir and what puffer would work there? Also some chichlids and maybe some schooling fish and discus. Do you think these setups would work and which puffer would work best?

 

[dcutl002]

Hmm. I don't know about puffers. They can be aggressive and kill the other fish.