hi, i just aquired a 75 gallon from my aunt (still waiting for the stand) but i wanted to prepare myself for setting it up. in it will be going two senegal bichirs, a common plec, and an oscar. the tank is coming with a fluval filter, she isnt sure what type and i am probably going to get a new one. i want a marshy set up for these guys, but since i have only ever set up a basic community tank, i need some suggestions. any and all advice is welcome!