very good on the Chapter the Second- Sizing your exhaust and intakes section
very informative

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just tryin to live the good life with my friend and wife now its time to and stay and be a
http://boards.cannabis.com/basic-gro...-dankness.html
complete guide to mothers clones and trimming roots http://www.cannabase.com/cl/index.html
these last 2 links have most grow books to read http://greenmanspage.com/guides/ growmoreweed.com