I was installing an attic fan in the roof and noticed the abundant amount of pink fluffy insulator, could I use this stuff as a grow medium?

__________________
grow # 1, incomplete- http://boards.cannabis.com/indoor-growing/81874-grow-log-skunkxhaze-clones-pakistani-hashplant-seed-pics-mother-plant-skunkxh.html

no definatly not
the growing rockwool is different and has hydroflujo and hydroretaining properties, which are not present in sound or heat insulation, also contains massive amounts of toxins compared to grodan or similar.
anyway rockwool is cheap, dont cut corners for the sake of a few pence youll regret it.

welcome to the world of endless possibilities,,,,hydroponics