I've seen a chipped tank be fine for years but, if that chip can run through the glass, I would be worried. Might be worth have CDA or someone fill the chip with resin.
From the net:
"I recommend you drain that tank and where that chip is and the run, press on it with your finger or thumb from the outside and inside. If it runs more you'll know your answer. Also, watch it as you push to see if it extends a tiny bit then retracts when you release the pressure. If it looks like it moves at all then it's junk. Obviously, if it runs it's no good.
Read more: http://www.tropicalfishkeeping.com/b...#ixzz3m8Im99gd
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