Afghi420
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I'd agree with everyone, you want your PH to come down a little. That's what the leaf twisting/curling is. But also - I see signs of nutrient toxicity. If you're getting toxic at a high PH then you definitely want to cut back a little once you get into the sweet spot. Burnt leaf tips, blueish leaves, and the drooping are all signs.
I would say a media ph between 6 and 6.5 is good for a healthy grow. The ONLY time I see problems in my garden is when my media ph is above 7.0, which only happens when it dries out too much. With water that hard i'll bet you're getting alot of calcium carbonate in your medium which will really start swinging your PH on the higher side of things. As your PH rises, micros become less available, and things start getting weird inside the plant, and they start looking like the ones you have posted. The only time I see such diverse reactions such as the ones you have pictured are when coco dries out and I have to figure out a way to work it to below 7. Generally, I swing my water between 5.8 and 6.3.
dutchman i would assume by slightly basic you mean slightly acidic...most growing regions across the world have soils with slight acidity.
I also think that pH of the medium is more important in indoor cultivation as opposed to outdoor, which I find to me MUCH much easier and a much simpler proposition compared to indoor cultivation. At least, that's been my experience. Also, using organic methods and feeding soil instead of plants allows much greater leeway here, again IMO.
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