Not your problem lol. I bought a tank that had "no leaks" turns out when i test filled it.... it had a leak haha. i ripped the tank apart and resealed it. good as new now! its pre owned and there is NO way to give someone a time table of WHEN it will leak, could be a year could be tomorrow. you did your part, sucks but its the buyers issus now.Thank you all for the advice. I've reached out to the buyer and empathized with their situation and asked for a video of the leak. They got a great deal on a packaged deal with everything, but they had just gone through a tank leak before this so I'm cautiously guarded. I just hate how this feels. :/