Does this look like slight magnesium deficiency?

Here's my mix. I have slight lime green and slight purple streaking on the braches and stem. If it's epsom salt I need, my assumption, how much more should I add?

Or do I need cal and mag and if so how much considering I'm using dry.

Masterblend 4-18-38
veg

4-18-38 mix 1.5 grams per gallon
calcium nitrate 1.75 grams per gallon
magnesium sulfate 1 grams per gallon
magnesiumnitrate 1 gram per gallon
N 117
P 31
K 125
Ca 88
Mg 52

Giving multiple forms of magnesium already what makes you consider a magnesium deficiency? Are you using tap water or RO?

RO

I think it's magnesium because that's what it looks like to me independent of my nutrient mix. Good chance I'm wrong but than again that's why I posted the thread.

From reading I've done magnesium can be attributed to both symptoms together. Purple leaf stems and lightening between the veins was an indicator of mag def in a few articles I read.

I'm open for alternate theories. Luckily it's not terrible if it is but I'd like to as adjacent to perfect as possible.

Are you checking/adjusting water pH?

High pressure aeroponic/undercurrent system
Ph 5.85 epi center main system, 5.5 reservoir to steer down and checked with two pens.
Water temp 66-68.
Room temp 75-77 day.
Room temp 66-68 night.
Humidity 55 fan on but only for 10min at a time, 70 fan off.
2ml of silica per gallon.

Try a foliar spray of Epsom salts. One tablespoon per gallon of water. See if there is improvement in a couple of days.

Thanks!

Do you agree or just informing me of the dosage?

Just wondering.

Your plants look short on Mg, although based on your mix I can't see that unless the Mg is being locked out. Your plants also look a little shy on N, which may be missing more so than it being locked out.

I would consider the warning from MasterBlend on how to mix your feed...in other words be sure you're mixing your feed correctly or according to their site you will experience lockout.

I would also consider that your mix is not in line with MasterBlend's recommendations. They suggest a 1: 1: 1/2: ratio among the components of your feed (MasterBlend: CaNi: MgSu You're mix is more like a .85: 1: 1.14

I use a similar feed system (Jack's 321) and I've found it's best to keep within the ratios recommended otherwise, lockout of some nutrients will occur.

Just some food for thought....Good luck.

Masterblends recommendations are a little off for the required numbers for cannabis. There is a thread, https://www.rollitup.org/t/jacks-321-questions.974851/page-5, that uses a hydro calculator to achieve the perfect ratios. If you read the page linked you will see my reasoning for changing the dosages for cannabis.

As for mixing that will not be the issue as I am very deliberate and process them correctly. I mix the fert, calnit and epsom each separately to a gallon of warmed RO water until there are no solids left. After doing this I add each one to 15 gallons of water and mix then do the same for each following nutrient. Then this is ph'd and added to the system through the epi.

Masterblend hinted on their site about a particular order of mixing your 3 parts. In my feed program, the Base is mixed first, then the Epsom Salt is mixed in, then the CaNi...I guess this is what you're doing as well?

I've seen the calculator you're speaking about and while technology and data are huge, your plant is telling you something else. Don't be afraid to listen to her. Good luck.

I ended up posting in the original thread from another and fiunf out the suggested mix from satori was using epson salts and magnesium nitrate, I thought the mag nit was a reprint mistake.
Thanks guys!

I agree that sometimes you just have to make a choice.

I dont have mag nit so I ended up using 1/5th dose of calimagic. Hopefully there is enough mag, iron and nitrogen and not to much cal. New growth is definitely greener today. Do hpa plants show nute changes this quick? It add 50ppm total to my nute mix.