12-27-2006, 08:38 AM
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Depending on where the chip is and how big the tank, it may or may not be safe. I have lots of chips on the corners of my 20 gallon tank, which occurred from tilting the tank on a surface when I was cleaning the tank. The tank is ugly looking on the outside, but has supported water for over 5 years. If the chip/crack is on the middle of the glass, then it would be more dangerous, since the pressure from the water could cause the glass to bow further, therefore, stressing the chip/crack even more. Moving the tank, which would cause the water to move around, would also increase the pressure on the glass. Water pressure on a larger tank is greater, therefore, it is more dangerous on larger tanks, compared to smaller ones. Plus if a small tank were to break, it is easy to house fish in bowls, pans, etc. Compared to a large tank breaking, which I'm sure you would keep larger fish and would have a harder time housing the fish.
Maybe provide info on the tank size and a pic of the chip/crack?