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  1. M

    XJ-13 (Jack Herer x G-13) problems

    I've never heard about being very selective about plastics. I'm using large polypropylene containers, those 20gal round tubs with rope handles that you'd put a keg into. Are there specific materials I need to watch out for? I'm using a digital PH/PPM meter. I calibrate it monthly using...
  2. M

    XJ-13 (Jack Herer x G-13) problems

    Well, would the fact that I have two airstones per res help? Each is attached to a separate pump (no splitters). Of course, I'd love to lower the temp in the room overall. The daily temp fluctuates between 70-78 on average. I already have a 400 CFM intake and a 1,000 CFM exhaust fan. An AC...
  3. M

    XJ-13 (Jack Herer x G-13) problems

    Hiya- So this is my first post here, though I've been reading the forum for a little while. I've got some growing experience, but never with XJ-13- and I'm having some trouble (see pics). Some of the leaves have been curling (around the edges) upward since very early in the vegetative cycle...
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