I recently had a leak. If I was to buy a used tank, I'd reseal it. It's actually quite simple.The same thing happened to my son about three months ago. He bought a 60-gallon Aqueon on sale from Petco. He got a month out of it before the seam gave way and salt water all over their living room floor. I gave him a 90-gallon Sepora I had and wasn't using anymore. I hope that tank holds up for him.