I was at work the other day and saw this guy about to throw out some fish tanks. I asked him if they held water and he said he didnt know just some junk outta his basement. I asked if i could have them and he gave them to me for free. Just a 20L and a 10 gal, but I figured what the hell. So I took them home and they held water. So now I'm cleaning them up. I will use the 20L as a hospital tank and the 10 for my jag fry.