Has anyone tried these? They look like a pretty decent product, and they're cheap! I'm wondering if they're a good alternative to rockwool, peat pellets etc.
http://www.ebay.com/itm/14123647287...&rkt=8&mehot=ag&sd=191795091666&ul_noapp=true
http://www.ebay.com/itm/14123647287...&rkt=8&mehot=ag&sd=191795091666&ul_noapp=true
