Looking for opinions...wanting to build a smallish pond in my yard and trying to decide on whether to just buy one of those 300gal rubbermaid stock tanks and bury it or if I should just buy a EPDM pond liner? The stock tank would be super durable and would probably never have to worry about leaks but is preformed and doesn't have any shallow shelves for plants and such and is pretty expensive compared to a liner. ive heared the EPDM liners are pretty good and could spend a little extra to get the 60mil instead of the 40-45mil, would be able to make it whatever shape I want, could make shelves for plants, but I have a whole lot of trees so should I be worried about roots destroying it in a few years?