Where can I get some net pots in large quantities (5,000 pots), and some trough liner?
You can get the net pots at greenhouse and nursery supply stores. What we use are “Poppelmann” 2″ net pots WITH a rim. We accidentally got the Poppelmanns without the rim once; we noticed when they slid right through the holes in the rafts and went underwater! Trough liner is ofter referred to as greenhouse cover material. It is 20 to 23 mils thick, is often reinforced with fibers, and is made from LDPE (Low Density PolyEthylene), and is usually found at the same greenhouse and nursery supply stores you can get the net pots at. DO NOT ask for hydroponic trough liner, NO ONE will have any idea what you’re talking about. Two kinds of liner we’ve used successfully are 23-mil P2000 by Inland Plastics Company, and 20-mil DuraSkrim R20WW by Raven Industries. Don’t use EPDM, a common black rubber pond liner, we have reports of systems taking a LONG time to startup when using this liner for trough liner. It is also NOT food-grade nor organically certifiable.
