According to Arjan's video (founder of http://greenhouseseeds.nl/shop/index.php?dispatch=pages.view&page_id=57 winner of 34 cannibus cups) for haze #3 (http://www.youtube.com/watch?v=OLGjqmDeKWw) ph should be 5.5 (slightly acid). Like a gardinia alkaline soil prevents uptake of essential...