RDWC- does ca uptake better with lower PH or Higher???

I seem to be getting conflicting info????

which is correct for ca?

May plants are having severe ca deficiency and need to know which is best?

6.2 - 6.5
Or
5.5 - 5.8?

I'm not seeing calcium looks more like ph issue overall. But if you're in hydro keep it 5.8-6.1. What nutes and ec/ppm?

Let the pH surf from 5.5-6.5, if you think calcium is the issue then keep the pH a bit higher, around 6.8. It’s good to let the pH go up and down naturally to let the different uptake rates for different minerals at different pHs

If it was me Id flush for 12 hrs then reset to 5ml gallon calmag and .6 ish ec make sure they have air.pH at 5.8 let it rise to 6.2 Edit...... Up your food as soon as you see more of a darker green

larrypizzimp93 said:

I'm not seeing calcium looks more like ph issue overall. But if you're in hydro keep it 5.8-6.1. What nutes and ec/ppm?

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Using current culture nutes
So coco cal + uc roots + veg a + veg b
I was holding steady at 6.0 when this happened.

roots are perfect. Nice and white and no slime

ph was at 6.0
Water temp 67 degrees
Ppm 410( 700 scale)
Blue labs guardian monitor calibrated

growth is super slow too

I’m wondering the there was hot spots from the lights and they started sweating? ‍

everything is dialed in

2nd for my range:

rkymtnman said:

2nd for my range:
View attachment 4660589

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Yeah I did drop to 5.5 and see what happens. Do you think .58EC is too high for 2.5 week old plants?

BurntByFire said:

Do you think .58EC is too high for 2.5 week old plants?

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it doesn't matter what i think, use your EC meter to tell you what they want to eat. i like a slight drop per day on EC.

BurntByFire said:

Yeah I did drop to 5.5 and see what happens. Do you think .58EC is too high for 2.5 week old plants?

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what kind of water you using?

larrypizzimp93 said:

what kind of water you using?

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RO

BurntByFire said:

Yeah I did drop to 5.5 and see what happens. Do you think .58EC is too high for 2.5 week old plants?

Click to expand...

rkymtnman said:

it doesn't matter what i think, use your EC meter to tell you what they want to eat. i like a slight drop per day on EC.

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I’m not getting any EC drops either
PH sits stable all week long as does my EC
Weird

and in regards to my brown leaves I fixed that issue.

I had fans blowing right on the plants which which was stressing the crap out of them hence the purple stems and was causing brown wind burn spots and not allowing them to breathe.
I thought it was strange that new growth was coming in fine with no issues just the bottom leaves....
Anyhow thanks for the help!

How big of a resevoir do you have.

I’m not sure which scale of ppm I am on but 400ppm could be why slow growth. Try 600-800 and stop when you see tips yellow. Ph 5.5-5.8 and let the pH rise to 6.8

SnidleyBluntash said:

How big of a resevoir do you have.

I’m not sure which scale of ppm I am on but 400ppm could be why slow growth. Try 600-800 and stop when you see tips yellow. Ph 5.5-5.8 and let the pH rise to 6.8

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yup,1.3 ec is the huckleberry,all the way through .

Like fulvics/humics are chelators for the essential nutes, Amino acids; namely Glutemic and Glycine is a chelator for Calcium. Except it works a lot better as it adds an opposing charge to the molecule so you have true active transportation of Ca into the plant. You want a good root system to handle it though. Otherwise you can foliar feed to apply it to the plant.

BurntByFire said:

I seem to be getting conflicting info????

which is correct for ca?

May plants are having severe ca deficiency and need to know which is best?

6.2 - 6.5
Or
5.5 - 5.8?

Click to expand...

PissingNutes said:

Calcium in Plants and Soil- Management of Nutrients

Calcium uptake by the plant is passive and does not require energy input. It is necessary to have a constant supply of calcium for continued growth.

www.smart-fertilizer.com

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Hi PissingNutes . I have a calmag products that lists calcium nitrate . I also have amino acids ( 2 of them ) ( Glutemic and Glycine I think ) . This got me interested in supplements that people take for bone health and discovered all of the calcium supplements include vitamins and other things . After reading about the topic on Wiki , I got the impression that amino acids can be used to chelate the calcium . I am curios if people can buy supplements that do not include vitamins and calcium that is not chelated . At that point I would take a seperate supplement of Amino Aids . The topic of calcium and amino acids can get very involved and complex in terms of chemical reactions .

No need to reply to my post . I just wanted to chime in of the running topic in this thread .

Halman90000

I just read an article that I thought was pretty interesting and know of one person it has helped so far. Specially this quote below:

A nutrient antagonism is when an excessive concentration of one nutrient inhibits the uptake of another. Since K, Ca and Mg have similar properties, and are taken up in a similar fashion, too much of one nutrient can inhibit the uptake of another nutrient. For example, if the concentration of Ca gets too high, it can impede the uptake of Mg. Or if the K concentration gets too high, Ca uptake can be inhibited. The ideal ratio of K:Ca:Mg to each other in hydroponic nutrient solutions to avoid uptake varies a bit, but is usually three to five parts K and Ca to one part Mg (3-5K:3-5Ca:1Mg). However, this tends to vary with plants. For example, lettuce and leafy greens do well when Ca and K are balanced with each other. Fruiting crops do well with a greater proportion of K.

The whole article can be found here; https://www.producegrower.com/article/hydroponic-production-primer-potassium-calcium-magnesium/

So with that in mind, why do people recommend to use calmag with maxibloom? The bloom already has the appropriate ration of K, ca and mg. My friend was getting a calcium deficiency from using calmag with maxibloom because the calcium was being blocked out from excessive mag... He dropped to just bloom and no more problems. He was using ro water btw...