Our website

Aloha! Please check out our newly updated website: www.thefishshack.com

Organic pond liner??

I've seen a lot of blog postings about "organic" certification for aquaponics, specifically pond liners. However, I can't find the scientific reasons for most of the opinions I see posted. There's disscution about plastics and rubber but almost nothing on traditional surfaces such as fiberglass, concrete and of course, clay[ fired or in place]. I suppose that ponds dug in ground at an organic farm would automatically be considered "organic", then again as you dig deeper in the substrate does that open an entirley new "can of worms"?