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However according to that chart he is going to have a rough time absorbing iron at 6.5

Check out this pic, he isn't effecting N uptake at 6.5

Also don't be afraid to fill the buckets if you are maintaining there temp and pumping lots of oxygen. In DWC or RDWC I treat water just as if it was soil.

You need to use a ppm meter with a ph meter. You need to see if your ph swing is based on nutrient levels or another factor. For 20$ I got a digital ph meter and ppm meter. It has done wonders for my grow. 5.2 is pretty low, have you seen the charts for what ph different nutrients can be best...

I agree with almost everything here, however with how dark his leaves are I'm not certain it's a N problem.

But I don't want to just be picking, looks like you got a nice setup and know what your doing!

I know defoliating is a loaded topic, but it is odd how your buds are drastically less fat below your layer of fans on each bud. I'll admit I'm a noob when it comes to experience but I sure do love reading. But it has me wondering if you trimmed those if they would continue to be fatter.

I would totally trim some of those big fans up top.

You say don't touch while flowering? You don't do any defoliation after flower starts? And are you against treating for mites? Green clean is pretty natural and safe, and I'll use azamax before flowering that works great.

So your DWC are you getting ph swings? What's your roots look like?

Well I'm still a new grower so I'd be slow to listen to my self lol. But even your new growth is exceptionally dark green. Which makes me think you may be making one of the most widely made mistakes and feeding too much N, you are pretty dark. I'd have to refer to my site but going from memory...

Yea sounds like you might be stunted but in the right wnvironment, hold tight

I mean I'm sure it's not magic but I'd think you would be slowly working to adjust the balance of nutrient within the coco.

Just trying to learn here, with coco how do you get them to decide to change up what they will absorb?

But I also see some normal white "pimples" I call them. I read somewhere that it was normal, I have had an otherwise normal grow so far though. Check out the bottom right though.

What are you referring to? I see some potential PM in the lower right corner.

Are you growing under LED by any chance?

If that's all you notice I wouldn't do anything yet, my stems turned purple in some spots and I'm A ok so far

Give us info, iron might be fine and might be way too much N. We are shooting in the dArk

Your in good hands with satori. I seen people criticizing earlier and it kind of pertains to this thread. Is it possible to burn tips on a lower ppm with the wrong mix of nutrients, then a higher ppm of the right blend be fine?