I am about the expand my 500g koi pond to 1,200g and im going to install a heater in it, looking for ideas to stock it with. I was thinking of doing an arowana and few mid dwellers like 2 peacock bass and a red bay. another part of me wants to try a few H. scomberoides and see if i can have some luck. just looking for people to throw ideas at me. note i live in florida so tropical fish are open to me.