Sorry to hear about this, I had my 120 develope a crack overnight and drained 100 gallons of water in like 5 hours, Woke up to your nightmare, scariest thing ive seen. If your ever in a quick bind for finding a quick tank to throw stuff into, I ended up using my bathtub. They are six feet long usually and pretty big so just dump as much water, powerheads and lr, and i had a quick make shift big tank. Unfortunately you saw the chip at first, you should have drained it that second, The slightest imperfection in the glass causes that area to be a weakspot. I know we want to say we can prob make it last. But from my lesson and this the tiniest chip will lead to disaster.