Is this just a textbook, run-of-the-mill CalMag issue?

Yozhik

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Hello [again] ...

Is this just your standard CalMag deficiency issue?

Plants are well into their Bloom phase - Day 43.
This is a Sweet Seeds Cream Mandarine Auto, which should complete in ~ 8 to 9 weeks.

I haven't been adding any CalMag supplements to the feeding.
Tap water here is hard, and have been using General Hydroponics Micro (Hard Water), but maybe it isn't enough?

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It could be but doesn't really look like what I consider a normal CalMag issue.. Let me look thru something as I seem to have seen this before... are you in soil? and are you PHing your water?
 
It could be but doesn't really look like what I consider a normal CalMag issue.. Let me look thru something as I seem to have seen this before... are you in soil? and are you PHing your water?

Yes, running in soil.
Biobizz Light.

Yes, all watering is pH'd religiously.

There are 16 plants in the tent.
Have on seen this on 2 of them [so far].
1 x Sweet Seeds Cream Mandarine Auto ... [1 of 3 - the other 2 not showing this condition ... yet]
1 x Sweet Seeds Cream Mandarine XL Auto ... [1 of 4 - the other 3 not showing this condition... yet]
 
It appears to be a Manganese issue I would recommend flush your system with clean, pH'd water that contains a regular dose of nutrients that includes manganese. This will remove any extra iron or nutrient salts that may be affecting the uptake of manganese, it will help restore pH to the proper levels, and will supply the plant with any missing nutrients.
 
most likely your PH meter needs to be calibrated as this common when the PH is way to high
 
most likely your PH meter needs to be calibrated as this common when the PH is way to high

Hmmm ... I calibrate regularly, but will redo it for sure.

I'd be really surprised if it was due to high pH.
The soil, Biobizz Light, is pH 6.0.
All feeding is strictly pH'd to 6.2 +/- 0.1
 
Hmmm ... I calibrate regularly, but will redo it for sure.

I'd be really surprised if it was due to high pH.
The soil, Biobizz Light, is pH 6.0.
All feeding is strictly pH'd to 6.2 +/- 0.1


based on everything I see it is Manganese and the cause of it is high PH. hydroponic micro nutrients supplement will help you.. a good flush may help get rid of the hard water or salt build up... but there is a blockage for sure....
 
Is this just your standard CalMag deficiency issue?
Manganese def is rare, Yoz. I mean, really rare.
Can you get a full plant shot with natural light?
Ripper may be right, but better light is needed. BTW, how hard is your water? What are the major minerals?
 
Manganese def is rare, Yoz. I mean, really rare.
Can you get a full plant shot with natural light?
Ripper may be right, but better light is needed. BTW, how hard is your water? What are the major minerals?

Water is HARD.
EC of tap water runs at around 0.6 +/- 0.1.

Not sure what the major minerals are.
All I know is we don't use it in the kettle to make tea or coffee!
The calcification on the element is horrendous.

... and to my taste, water is 'salty' - IMHO.
But then again, so is bottled water here.
Not scientific I know, but anecdotal?
 
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