yellow leaf tips

I run the 321 as well and at that ratio I'm around 1000ppm with 150 tap, every time I've had tips like that it was nute burn maybe time to flush and back the nutes off to about 80% of the 321 and lower the ph a bit 5.9 6.0 ish and see what she does, not a for sure diagnosis but that's what I would do in my spot
 
I would agree with Gweedo, looks like nute burn and perhaps mild PH issue. I don’t think I would lower the PH though, flush with plain water, cut back on the nutrients. PH nutrients to 6.3 for a couple waters, see if she perks up. Just my two cents, not a pro, just an average guy.
 
I would agree with Gweedo, looks like nute burn and perhaps mild PH issue. I don’t think I would lower the PH though, flush with plain water, cut back on the nutrients. PH nutrients to 6.3 for a couple waters, see if she perks up. Just my two cents, not a pro, just an average guy.
In flower I like to run higher PH levels in hydro, soil, coco, with all nutrients. In my experience.
 

Jewels

Tilts at Tables
I have a bunch of plants that look like that, right now.

First, I let them dry out a few times and the lowers yellowed off.
,,, then I drown them.

Our situations may be completely dissimilar, although our plants look identical.
 

Jewels

Tilts at Tables
Gonna air some dirty laundry here,,,,

This is over watered, with low ppm/high ph.
200ppm at 7.5-7.7 ph
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That is all HPS goofy , so I pulled out the ugliest bastard I can find.

I know this looks right ghastly. However, I am cool 'ly unconcerned. I got 60 other plants in the room with varying levels of this going on, and I know that (watering regimen) is the only thing out of whack.

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I suspect, even if you did everything right from this moment forward, your plants still may present like this, in a week or so.
I am just here to say "don't fret it"
It would appear you have been successful, up until now, just keep doing what you have been doing.

I scolded myself and stopped giving them plain water. She straighten herself out immediately.
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New growth is just fine.

It is always so tempting to change things up when the voice in the back of your head says,
" I am doing everything wrong"

You got this far.
So assume you're doing everything right. There is just a little something amiss. NO-ONE is immune to that.
 
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