ive always been a bio guy.... i just overflow the tank with air bubbles and it gets a nice even ecosystem... my silver sharks love the bubbles. My tank is brackish, i have spotted puffers and silver sharks in it.
BTW Jack Dempseys are FTW!! i love them.
My father has a 200 gallon tank in his basement with a 2 snakeheads and 2 oscars in it. hes had the snakeheads for sooo many years now.

I dont know if you all care for them but Mollys can live in salt water and they actually get some nice color to them. i dont have them anymore cuz i wanted puffers instead but they were cool.

i want to start an arrowana tank. i like the taiwanese or korean ones, i dont care for the amazon ones. any suggestions on them?