Hey folks! We're redoing our office and with that comes restarting a 4' 120G. My lovely wife has let me choose the stocking and I've decided to go with a "prehistoric" African theme. I'm planning to have it heavily planted with low light and floating plants (easy). I'm thinking about a group of elephant nose, group of butterflies, and possibly a bichir. For those with experience with them, is that too many fish for this tank size? How many of each would you stock? Any advice on substrate with the elephants in mind? Tank will be over-filtered (with as muted flow as possible) and get a 50-75% WC every 4-10 days. Thanks in advance for the advice.