The standard way of resiliconing a tank isnt too difficult. However I ran into some issues with a tank that was injection molded. The silicon looked old and crusty, so I started to remove it. It is hard to explain, but long story short it is extremley difficult to remove, and even if I do the structure would be ruined. would pond liner be a solution? The obvious would be to silicon it, but from what I know new silicon doesn’t stick to old silicon at all. pond Liner came into my mind since it seems like it would be easy yet effective. I can post some pictures later since it is hard to describe. Any feedback would help, thanks.