i can see the bowing by looking at how the hood meets with the edge of the tank. It seems to be made of glass, but it should have shattered if it bowed. so maybe it is plastic. Either way I think ill make a brace.
I have a ten gallon tank with 4 sailfin mollies. Two mature females and two fry. There were 2 mature males but they died. I was wondering if the tank is filled or if theres any small fish i can put in the tank. Thank you!