I had moved my 40b from my office to the garage a few months ago in preparation for the new tank 75/90. This morning I went to turn on the lights and saw this crack on the black frame that wasn’t there last night. How worried should I be? Do you think it's about to explode? Don’t want to loose my acros and fish. I have been calling/emailing a number of LFS just before corona and now. No one is getting deliveries of tanks. If needed I will go to petco and get another 40b