I'm considering adding a second layer of LEXAN 6 mm 2-wall polycarbonate sheets (as described here:
http://sfs.sabic.eu/product/lexan-thermoclear-sheet/ ) to my greenhouse. As I understand it, the "UV resistance" is there to protect the polycarbonate. What I'm wondering is, will the added UV resistance be detrimental to the growth of tomato plants?
Steve