What PPMs do you aim for when mixing up a solution?

N

North...

Active Member
I have a cheap TDS and usually aim for about 900ppm. However, I noticed the plants aren't burning (I stepped them up to address this issue but no change) however, I have some strange yellowing and pale green leaf. Does it look like a spot of calcium, magnesium deficiency and the possibility of not enough Nitrogen? What are your thoughts?

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OneMoreRip

OneMoreRip

Well-Known Member
what is ph of run off and ppm/ec of run off. I go for 700ppm, 1.3 ec. ph first, most important to know it's good because if not, nothing else works
 
OneMoreRip

OneMoreRip

Well-Known Member
the plant uses the ppm so if anything it should be lower than what you are watering with. not to say ppms cant build up in the medium

id check calibration on meters and what nutes are you useing and how did you check ph and ppm of medium?
 
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Southernontariogrower

Southernontariogrower

Well-Known Member
I go for low ppm when small and raise as they fill out. 800 is a good number for bigger plants. After flip l feed veg for first two weeks raising to 1000 by end of 2nd week. Middle of week 3 and just upped from 1300ppm of bloom to 1500 ppm. If no burning tips l might try higher. Hope that is example of what you asked for? My city water is around 350 ppm and l add epsom salt to 500 ppm starting point. Ph at 7 before nutes 6.4 or a little lower as ppm goes up but lm good with that.
 
N

North...

Active Member
That’s awesome thanks Southern just what I was curious about.

OMR, I have the ph soil pen and the tds meter which I don’t calibrate as it seems fairly spot on my gut tells me. Ph pen I do calibrate each month.

Interestingly this is AC/DC and next to it Charlottes web. Both cbd strains seem pale and having issues. Yet the cookies and great white shark look strong, healthy and robust.

All growing in the same configuration, same reservoir, same coco brand. Nutes are mostly canna a and b, plus cmx and a touch of sea weed juice or neem as I go.
 
Star Dog

Star Dog

Well-Known Member
1st stop with problems for me is rinse nutrients through the plant and measure the ec if it's too high I need to back off ec if it's low i need to increase it.
What ec/ppm are you using?
 
OneMoreRip

OneMoreRip

Well-Known Member
North... said:
That’s awesome thanks Southern just what I was curious about.

OMR, I have the ph soil pen and the tds meter which I don’t calibrate as it seems fairly spot on my gut tells me. Ph pen I do calibrate each month.

Interestingly this is AC/DC and next to it Charlottes web. Both cbd strains seem pale and having issues. Yet the cookies and great white shark look strong, healthy and robust.

All growing in the same configuration, same reservoir, same coco brand. Nutes are mostly canna a and b, plus cmx and a touch of sea weed juice or neem as I go.
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I find it hard to believe that the medium of the good and bad plants has the same ec/ppm and ph. I think in coco also want lower ph 5,5-6.5,
 
OneMoreRip

OneMoreRip

Well-Known Member
Star Dog said:
1st stop with problems for me is rinse nutrients through the plant and measure the ec if it's too high I need to back off ec if it's low i need to increase it.
What ec/ppm are you using?
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if ph is not good then ec doesnt really matter, check ph and ec. ph most important imo
 
N

North...

Active Member
Not suggesting each pot has the same test result, I am commenting visually. None have showed any signs of burn even when boosting ppm as high as 1400-1500 ppm.

Star, the ppm meter is set to just ppm vs us/cm
 
OneMoreRip

OneMoreRip

Well-Known Member
Star Dog said:
PH isn't something I've ever had issues with using any of 3 well known nutrients, 5.8 to 6.5 is fine, a ph drift gives a wider range of available nutrients.
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lots of people have had ph issues and ph is very important because if not correct, nothing else works correctly.

If you know your ph goes up, then start at 5.7 or 5.8, if you know your ph goes down, make it 6.2 or 6.3, you will have drift (I think it doesn't matter), and you will average near ideal ph.

also ph can change in res over time prior to refilling, something to consider, i think mentioned already but important

@ op, all the purple stems, i'd put money on ph being off
 
Star Dog

Star Dog

Well-Known Member
OneMoreRip said:
lots of people have had ph issues and ph is very important because if not correct, nothing else works correctly.

If you know your ph goes up, then start at 5.7 or 5.8, if you know your ph goes down, make it 6.2 or 6.3, you will have drift (I think it doesn't matter), and you will average near ideal ph.

also ph can change in res over time prior to refilling, something to consider, i think mentioned already but important

@ op, all the purple stems, i'd put money on ph being off
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Sorry man my mistake, I was meaning/thinking I've not had problems with ph... But after it's mixed and been ph tested.

So yes it's important to know the ph when mixing nutrients.
 
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