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Thread: Can I use industrial grade rockwool for my hydroponic medium?

  1. 12-25-2007, 07:46 PM #1
    Medical Marijuana
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    Can I use industrial grade rockwool for my hydroponic medium?

    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.
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  2. 12-02-2010, 11:27 PM #2
    Diegomunoz001
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    Re: Can I use industrial grade rockwool for my hydroponic medium?

    Has anyone ever used or heard of "Sure to grow" medium products? if so, is it as good as they claim to be?
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