You should never see the blow. If visible that is no good. It with break or permanently bend over time.Leak test passed, but the center brace disconnected from one side and there is slight bowing.
you can see the center brace against the back glass of aquarium in second photo. The bow in the front is fairly slight but enough to pop that off of one side
how difficult is this to fix?
frame or brace required if you ask me