stress spot

With the recent tropical storm that hit the US, my house had no power for 60 hours. I had to relocate the fish to a shop we own. I noticed a splotch on my clown’s pectoral fin, but knew there wasn’t much I could do. (I was at work when the storm hit and the tank had gone 16 hours without power...

My tank developed these cracks over 4 months or so. I haven't seen them increase at all, but I'm not sure if I should go ahead and start looking for a new tank.