Right now I have a 6” Oscar and a 2” Jack Dempsey and Green Terror in a standard 55 gallon tank. When I upgrade my tank, it is looking like I will have to stick to a 4’ long, due to the amount of available space in the house. So that leaves me choosing between a 75 and 90. Obviously bigger is better, I was just wondering if the 5” extra height on the 90 would be that much more beneficial for those types of fish (opposed to extra space in length rather than height).
