As for a person who doesn't know the inside story, your worries are not unreasonable. I can inform you that as long as it is a decent aquarium (note: not any village built it at will), this is guaranteed. The glass in the aquarium is all double-tempered and glued glass. It is difficult to break it with ordinary tools. Even if the glass is broken, it will remain intact and the water will not escape. ,
Generally speaking, the design safety factor of aquarium glass is above 10, and the design life is generally greater than 50 years. No matter in terms of force or durability, there will be no problems within the regular design life. Even in extreme conditions (natural and man-made disasters), all aquariums have drainage measures (usually they can be emptied within a few minutes).
In addition, in the emergency situation of broken glass, all aquariums have emergency drainage and water storage equipment. The depth of the water at the location of the visitor will not exceed 10 cm, so it will not hurt the visitor. The aquarium has strict inspection and maintenance rules, and the inspection of key parts is stopped every day. Once an abnormality is found, the aquarium will never be forced to open until it is properly handled.