Can I use industrial grade rockwool for my hydroponic medium?

Added by: MedMan

Most industrial insulation contains a fire retardant chemical that severly restricts growth and will cripple your plants.

The only option is horticutural grade, grodan and oasis for example.

These Documents contain information gathered from many Online Communities and all possible references have been given to the authors of each individual article. For any discrepancies in this please contact "overgrow2@gmail.com" ....ps enjoy