Bigger fish like bala shark for 90 gallon tank may be possible. But it is very risky and packed in 90 gallon tank as it is 4 to 5 feet. If 115 gallon is used it will be easy for bala shark to move a little bit.
Nice tank with wooden frame. The dark brown paint looking very nice on it. But whether this wooden frame survive with watered tank of 90 gallon size. It may be dangerous for paint and wood both as result of water humiliation.