Phong, I have a 3k that came with the setup that I bought, but I never used it. According to the seller, it was probably used for a little more than a year about 3 years ago, and has been sitting in the stand for more than 2 years. It has salt creep on it and some rust. I plugged it in for 5 seconds, and it seems to be working. I did not hook it up with water, so I do not know if the seal is good. It's yours if you want it.