I've been looking for a deal on a tank upgrade for my oscar from her 75- I was thinking a 120 or 180, but I found a super deal on a 400 gallon that I might be able to arrange! 8' x 2' x 3'. If I can go with something that big, I'd definitely love to do some tank mates in there with her, but I just don't know all the options for such a big tank! I'd love some ideas or inspiration. thanks!