05-18-2012, 04:00 AM
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Join Date: May 2011
Location: North Florida
Naviras is correct, there are alternatives to using rockwool, etc which cost a LOT less in the long run.
We were testing using regular sponge based materials, that germinated perfectly, and the materials to make several thousand cubes was under $35. However, the ability for someone to produce or grow their own luffa sponge would make the system that much more all encompassing. Essentially growing another integral part of his overall medium.