Thanks for the reply, and for filtration I have an aqua clear 110, and an fx4Mike1995 said:I'd get at least the silver dollars and oscar at the same time. The silver dollars have a round shape so especially if the oscar you get is a juvenile at first, I can't imagine he or she could eat the silver dollars.
I Don't know anything about bichirs. someone else can help with that
What kind of filtration do you plan on running? I'd use a canister or sump for a 125g.