lava rock for medium in ebb n flow?

Discussion in 'Growing Marijuana Indoors' started by doob3r, Aug 3, 2008.

  1. is lava rock just as good, or do i just need hydrotron for this, u used hydrotron in my DWC grows but was going to switch to lava rock, how will lava rock fair in ebb n flow?
  2. lavarocks will work fine in an ebb & flow system but i personally would stay with the hydrotron due to several reasons;

    lavarocks have irregular micropores that roots & bacteria love to fill,sterilization is never guaranteed unless your using them for 1 grow only then buy more.
    They also might contain traces of heavy metals which could cause ph swings & nute deficiencies.
    irregular rock shapes provide uneven airation & wetting in the rootzone,roots will be less able to penetrate evenly throughout the medium.

    Hydrotron stays moist longer & lacks the sharpness that tends to be harmful to soft tissues.

    my 2 cents mate, hope it helps:smoke:

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