A short video on why I use rockwool grow cubes for my hydroponic systems,

Link for amazon deal for cheap cubes: http://www.amazon.com/gp/product/B0087SJ3U0/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B0087SJ3U0&linkCode=as2&tag=thgrge05-20

Why I use Rockwool / Stonewool grow cubes for hydroponic seed starting and plants

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