Like I said, I'm new, and everybody says you need to pH your water, even for an outdoor grow. My tap water comes out about 8.8 and I've been taking it down to 6.5. You tell me this is maybe unnecessary?
I've also read that the purple anthocyanins are a natural reaction to sunlight, a method whereby the plant protects the chlorophyll from sun damage.
That's the problem I'm finding, as a newbie. There are at least 5,000 opinions on each and every micro-factoid associated with growing cannabis. Sometimes it's hard to extract the consensus view from all the noisy talkers, not to mention being able to recognise subtle things that may run counter to "common knowledge."