First, I hope everyone and their families r ok after the storm. Those have lost tanks, homes or anything else I am truly sorry for your loses. Remember all this shall pass! While cleaning up I hit the corner of my sump, I chiped the corner and it cracked about 4 inches I cannot feel the crack on the inside or out side of the tank, do you think it will be ok to use? It is a 75 gal. Glass sump. Also when you connect a true union ball valve that is threaded to a piece of threaded PVC should I use Teflon tape on the threads? Thanks, take care everyone.