I don't have to look up anything, I graduated from college years ago, I'm not posting questions about what's wrong with my plants and posting pics of plants with issues on the interwebs.
In my experience anything over consistent pH 6, issues begin to arise in hydroponics.
I said, show me a good hydro grower who deliberately sets their pH at 6.3. ain't going to happen because good growers know better. A slight pH rise is good at the end of the week, 6.1, before res change and reset to 5.8. and yes, I change the res out every week.
So you are underfeeding your plant intentionally? I guess I don't understand this thread. You asked, I told you the problem and solution so I tried to help.
So I'm going to regroup and take this again from the top. I made the post this morning with a 95% idea of what my particular deficiency was and how to fix it. I'm new to the forum so I put up the post for the knowledgeable and beginners alike to try to generate some discussion and ID the deficiency..
Lets remember I never once asked for advice. The post is titled "Name the deficency" Not "I want help" or anything resembling fixing the problem.
You pipe up with the notion that my calcium deficiency would be best fixed by lowering my PH? no?
I nicely reply that my PH is a bit high and not a problem and you get your nose out of joint with my reply and absolutely insist that my PH needs to be lower.
Let me say that THIS IS ABSOLUTELY THE WRONG ADVISE for correcting early stage calcium deficency. WRONG WRONG WRONG. IF in fact the plant wasn't taking up enough calcium (and there was enough in the solution) the proper advice would be the exact opposite. Maybe to bump the PH up. So in fact your college education did nothing in this case but dole out bad information and the exact opposite of what the solution would/could actually be.
Lowering PH does not increase calcium uptake. The fact is that calcium uptake inreases as PH goes up. Again I will state that I am within the PH perameters of whats exceptable for hydroponics. Even at 6.3. (in fact I've had PH creep to over 7 with no adverse reactions.)
Now let me explain why I start so low with nutes and why I'm not too concerned with PH early on.. For one most plants handle it just fine early stage. This particular cultivar obviously is a little hungrier for calcium than most I've grown. The reason I start low is that inevitably at some point the rockwool will start building up salts. Always has always will. As root balls get bigger it gets harder to flush out so I start low (ph is not an issue). I'm sorry if I hurt your feelings but I'm not going to humer you and accept completely wrong and opposite advise . Once again lowering ph to increase the uptake of calcium is just plain WRONG. I will make sure from now on not to take your advise from here on. College degree or not. Thanks but no thanks.I'd like other opinions here as well if they think I'm wrong.
CALCIUM UPTAKE GOES DOWN AS PH Goes DOWN.....NOT UP.