Leaves turning copper - excess of chlorine?

Hey guys! After yesterday's feeding a few of my plants had their intervenous leaf matter turn a deep copper/bronze color as seen here:

My best guess is it's an excess of chlorine but I was hoping someone could confirm. Not sure where it would come from unless my town suddenly upped the amount in our tap water. I don't think there's enough in the GO nutes to cause it but if anyone knows differently please let me know. I'm pretty heavy handed with the nutes so I'll be flushing them either way to clear it out but I'd like to track down the source.

It's not affecting my autos but they are in much bigger pots.

If you have medium like soil or coco then I think you will find the root zone pH is really low. Anytime I see that stripey burn pattern it's low pH.

Renfro said:

If you have medium like soil or coco then I think you will find the root zone pH is really low. Anytime I see that stripey burn pattern it's low pH.

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Interesting. Thanks for the advice, I'll have to bust out my pH pen. I haven't had to adjust my pH since I switched to soil so I rarely check it these days.

If you input 6.5 and the runoff is 6.0 then the soil pH is definitely much lower than 6.0. A good soil pH meter like the one from bluelab will give accurate readings. Save the money on the cheapos they aren't worth a penny.

Yeah, I learned that the hard way trying to get away with a cheap TDS meter when I was doing DWC. I'll have to pick one up. Hopefully the local hydro shop has one so I don't have to wait on Amazon.

Thats a good one. So is the Apera ph60S (spear probe)

Don't use the probe to poke the hole or you will break the probe. The blue lab comes with a probe cover that you use and the apera you buy the sticker seperately.

Perfect. Appreciate all the tips. I'm 4 weeks from flip already so I definitely don't want this to snowball.

I use both of those meters and they are worth the money. You can test liquids as well. No need to have a liquid only pH pen.

I think you hit the nail on the head Renfro. Good looking out man. According to my little Hanna Checker (after it throwing errors the first three times I tried to calibrate it, piece of junk) my water is going in at 6.8 and runoff is 6.2. Definitely going to get one of the meters you recommended tomorrow just to make sure. Any tips on raising the soil pH? Since I'll be making a trip to the hydro shop I'll just grab whatever I might need.

Renfro said:

Medium pH Correction (Soil and Coco)

Checking and adjusting the pH of your root zone in soil or coco is a very important part of growing healthy plants. Often you will notice nutrient deficiencies despite the fact you know you have provided an ample feed at an appropriate pH level. When this happens it’s generally either...

www.rollitup.org

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Your the best. If I knew you in real life I'd buy you a steak dinner.

Gentlemencorpse said:

Your the best. If I knew you in real life I'd buy you a steak dinner.

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Mmmm... I love steak.

Gentlemencorpse said:

Your the best. If I knew you in real life I'd buy you a steak dinner.

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Yeah, I still owe him one myself! LOL! He seriously knows his stuff, and has helped me and a ton of other growers get back on track for sure!

Renfro said:

Mmmm... I love steak.

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Heyyo Renfro,
Im exactly having the same issue. Using BIobizz Light Mix, checked my Soil PH and it says its 5.6. Since organic Soil should have the microbes do the ph-buffering, Im still wondering if i should try to aim for 6.3.
My feeding water is messured at 6.2-6.4 everytime. ph-upped by adding sodium bicarbonate.

If its the ph-zone, can i use sodium bicarbonate to up my soil ph?

thank you very much

what kind of lockout does this symptom resemble? does anyone know?

Do not use sodium bicarbonate.

Potassium bicarbonate is OK in a pinch.
But really you need some bennies.
Recharge would help.

thanks for the answer. because of the sodium? What are bennies? non native speaker ^^

Psychobizkit said:

thanks for the answer. because of the sodium? What are bennies? non native speaker ^^

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Interesting nick for anon native
WELCOME TO RIU

Herb & Suds said:

Interesting nick for anon native
WELCOME TO RIU

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Thank you. I enjoy this place very much so far. Lots of experience at one place. !