my Zen Water Garden and Koi Pond

[kien]

Originally Posted by Oilers

Kien,
Your pond is looking better and better each year. I am just wondering what the use of the cardboard is.

Thanks! For additional cushioning to help keep sharp objects like rocks and twigs from poking at the pond liner. It's a bit overkill but I had LOTS of cardboard boxes around and it worked out quite well. A lot cheaper than buying actual pond liner fabric. I have also previously used a generous layer of newspapers and have also seen old carpet or carpet underlayment used.