gallons

Hello all! I have a fully cycled 150 gallon tank with 4 angels and 5 clown loaches. I have a BGK and will be getting some Bichirs, so here is my question. How many Bichirs could I get and not be pushing an unhealthy stocking level? Only upper jaws. Nothing huge. I have a sponge filter, 575 gph...

So. I recently got into arowanas. And i started researching aquarium sized. However i live in an area without alot of aquarium activity, Like Theres some 50 ish gallons, But no big ones But anyways, My question is. Could an arowana fit in a 185gal tank? (You post sizes since i might just build...