Hmmm...got a problem....My pond is leaking...Not much, about a glass per six hrs, but too much to leave... The linner must be holed, and could get worse at any minute. I wanted to box it with ply and tile initially, but ended up lining it due to time constraints, and the fact the wood supports are not straight. So I need to make the box smaller than the supports, slott it in and fill the gaps with something, not sure what... Polystrene sheets? Expanding foam, Cement? Ideas?
