Hey Infinitalus, it does look like a calcium deficiency in my leaf pictures. I can't tell from your profile how long you've been growing. Have you had much experience before joining this forum? I'm wondering whether this could be a case of nute lockout, i.e., too much nute, rather than deficiency.
That's because the pH in the res water goes way up whenever I try to raise the nute level above 425 ppm or so. But around 400 ppm, the pH goes down very quickly during the day and she sucks in lots of water. So she seems to be happier there.
I'm using AN perfect pH Connoisseur base nutes. The company says that you should never need to add a Cal-Mag supplement to them, because they contain enough of those minerals. So if my plant is low in calcium, then she probably needs more base nutes, right? That's what I've been adding whenever the tds drops below 390 ppm.
I'm not saying you're wrong about anything. I'm just stating what my limited understanding of these products is. At this point, I'm guessing that it's nute lockout from all the times I attempted to raise the tds up above 430 ppm. If you disagree, please chime in. Anyway, thanks for your valuable input.
