I just got a 75 gal tank, largest tank I ever owned besides a 29 gal, so kinda new to maintaining big tanks, My CK is about 8" and now much happier in the bigger tank, just wonder what other types of fish would be good to put in there, I have a Tiger Oscar about 4" and deciding to put in a Red Belly Pacu or a Peacock Bass. In Hawaii we don't have that much exotic fishes I guess or i haven't really found them. By the way what are Dats?