Over the past few months, I've noticed small scratch-like cracks starting to appear on the insides of my 90 gallon acrylic aquariums, especially around the middle. Today there was a big earthquake that really rocked and shook the tanks around. When I fed the fish later today, I noticed that the cracks had gotten larger and many more had formed. I am afraid that the tanks could break, but I'm not sure. They aren't leaking and seem stable at the moment. Is there anything I can do to fix these cracks? I'm nervous that the aquariums could collapse or start leaking. Any help/ advice would be greatly appreciated!!!!