Help with High PPM

For the past couple of days,I’ve noticed burnt tips with a yellow vein and yellowing on the outer of the leaves. This is just happening on the top that I can tell.
My first thought was a potassium deficiency so I checked my runoff which was at 5.9, I ph at 6.2.
So I checked the ppm of the runoff and was blown away at 2300.
I feed with it being around 1200 and 1300.

My question is should I do a complete flush or just a light flush? I’ve included some pics but they dont really show the yellowing on the outer part of the leaves.


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Should have had the title say Nutrient Lockout :joy:

I don’t really see an issue?? The burnt tips are normal and most likely from a little too much nitrogen in the seedling or early veg. Coco or soil? The PH is in the range for coco. Those run off numbers are high. What’s your nutrient PPMs going in?

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Im growing in promix,my nutrients ppm was at 1300 going in

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Premix a coco medium, I’ve never grown in that brand? At 1300 going in and 2300 coming out leads me to think you have a salt and mineral build up in the root zone locking out nutrient uptake. As healthy as she looks personally I wouldn’t flush just yet. I would reduce my nutrient solution to 1/2 and makes sure you’re feeding to run off to wash that build up away. Daily health checks after that for a week or so. Crucial to feed/water to run off everytime :love_you_gesture:

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I think that was where my problem started,they was a couple of feedings where I had very little runoff.

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That’ll do it and been there. Good thing is you tested those numbers early before there is an issue! Nice job :love_you_gesture:

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Thanks,I still can’t believe it was 2300. Crazy! Im using one of those cheap vivosun ppm pens so i don’t know if thats on a 500 scale or not.

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Yeah that scale is critical. I’ve had run off numbers above 3000 when I was using fox farm nutrients. Switched up to jacks 321, simple a no issues. I had the cheapy Amazon PH and TDS pens when I 1st started and realized how critical the PH and PPMS were and invested in an Apera PH pen and Blue lab TDS.

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Im also using a Apera ph pen,love that thing. I started out with fox farm on my last 2 grows but quickly changed to GH Maxi series. Not a fan of ff at all

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On point with this one! Yeah I love the Apera pen. Keep on rolling Brother, they’re doing great :love_you_gesture:

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Will do,thanks

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Plant looks great , I’m with @OGIncognito I would not do a Flush. Maybe water only couple times in a row. Good luck my friend ! :v:

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That’s a better alternative than 1/2 nutes! Appreciate that Kellydans :love_you_gesture:

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Thanks,I’ll give that a try to see how she starts looking. Really hate to do a flush since shes all tied up in that net. No way getting her out.
If i do have to flush,I’ll have to get my shop vac cuz im not using this turkey baster that I use for runoff lmao.

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Yeah , after watering to run off 2 times in a row follow up an check the PPM. Probably will need to come back with feed.

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I just got done flushing with 3 gal of 6.5 tap water and the numbers of the runoff were 6.1 ph and 862ppm. Hopefully that fixes everything. Should i top off with a feeding or give her time to dry? I also wanted to thank you and @OGIncognito for advice. Very much appreciated!:facepunch:t2:

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That would be a good plan follow up with feed.

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Yes, should follow a flush a flush with a nutrient feed. Good numbers now!! Nice job :love_you_gesture:

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I would be careful with using that high a PH in pro mix. Pro mix is 100% peat with dolomite lime for PH buffering. It is considered a soilless medium and therefore treated as hydro for ph purposes.
This is from phorticulture DOT com article Using PRO-MIX in Hydroponics dated
Tuesday, November 9, 2021
…This pH fluctuation can cause the nutrients to become unavailable or excessive for plant uptake. The optimum soilless medium pH for nutrient uptake is between 5.5 and 6.0.

I use coco with perlite and Jack’s 321. Going in I ph to 5.8 - 5.9. PPM will typically be 1000 to 1100. When top feeding I make sure to get good amount of runoff. However, even doing this the runoff PPM will increase over time. PPM can push as high as 2100. When this happens I drop the feed ppm to 600 - 800 for a couple of times. The PPM will drop closer to normal and I return to the higher feed ppm. If you flush nutrients out of the medium you do need to feed the plants soon other wise they will starve.
Sounds like you are on the right track.
I like this ph chart

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