Folks, returning to reefing after a long hiatus. Was given a c-250 for free. After quite a bit of cleaning, leak test, placing, and leveling I noticed a gap in the images attached. There is a small gap across the front of the tank between tank and foam. Rest of the tank flat as a board. Being free , I could always scrap the setup, save the equipment, and get a new tank. But if this is not a big concern I’d like to move forward with working on the tank. I filled with 40 or so gallons , tank still level and gaps closed up, worried about undue pressure points and of course the dreaded tsunami of a break. Anyone have the same experience or advice?