Cyco's Autopot, Pro-Mix, Jacks321, Mandarin Sunset, 2022

C

Cycosis101

Active Member
System is Autopot 2XL
Reservoir is 12Gallons with a Vivosun circulation pump and an airstone
Vivosun.jpg

Lighting is 2x HLG QB 96v2 on a custom extruded aluminum frame.
Tent CoolGrow's 3ft x 20in
Coolgrows.jpg

AC Infinity Cloudline T4 exhaust w/ carbon filter
Cloudline.jpg


Strain is Mandarin Sunset by Ethos
Nutrients are Jacks 5-12-26, Calcium Nitrate, epsom salt following the Jacks 3-2-1 Formula coming out to 2.2 EC/5.9PH
Calcium Nitrate.jpg
Epsom Salt.jpg

Growing Medium is Pro-mix HP Mycorrhizae in 3 gallon smartpots
Grow pots.jpg

Water Source is RO water from an APEC system
APEC system.jpg


Flipped to flower 8/29/2022
Lights are currently at 130watts @ 18in, averaging about 500-600ppfd across the canopy
Temps range from 73-81
Humidity sits around 55%

308262528_819551492806099_2544383998483476954_n.jpg
 
What is your feed ppm's ?

Looks like too much to me...

Cheers
 
Coco will produce more than ProMix without question.

I'd say the top plant has a toxicity of some type (possibly phosphorus) and the bottom one looks great!

How much of each nute are you feeding? I'm curious what your numbers are so I can calc them out tomorrow.
 
Cycosis101 said:
2.2EC, 5.9PH.
Click to expand...
On what scale ?

Either way I'm sure you are over 1000 and although I'm not familiar with Jacks, I would think that is too much.

And that is your problem, not ph !

Cheers
 
And again, that second post is the same strain veg plant under some shitty led taking this strength nute no issue.

As I said in your tech post Shed, I've "ammended" my promix with gh pH up, but I don't think it would last if I kept my same habits up of dumping in pH down, so for now I'm not going to be PHing my reservoir.
 
At your numbers, you are feeding:
140-50-205
Ca = 121
Mg = 92
S = 122

By my calculations for full flower you are in range for NPK, but over by 34% on Ca, by 104% on Mg, and 662% over on S!

Even without the epsom salts the Jack's A alone puts the sulfur too high but at least the Ca and Mg are close to range.

Drop the epsom salts and go with 3.2g on the Jack's A and 2.8 on the CaNO.

That puts you at 130-44-182
Ca = 106
Mg = 53
S = 72
 
:popcorn:
 
I mixed my res up at your ratios, diluted to 1.2ec, did another slurry test, still at 5.5ph now. Just a waiting game to see how they take it.

I was curious what your thoughts are on the 1 part Jack's RO 12-4-16 schedule.
 
5.5 is where you should be so I'm calling the lower result an error of some sort.
Cycosis101 said:
I was curious what your thoughts are on the 1 part Jack's RO 12-4-16 schedule.
Click to expand...
It has 0 sulfur or silica and is low on Mg. For full flower (if you don't mind no silica) you could go with 4.9g Jack's and add 0.7g epsom salts (per gallon) to end up with:
156-23-172
with Ca 91, Mg 45, S 25
which looks good to me.

A little high on the sulfur but there's a lot of it in epsom salts!
 
Just for clarity, Jack's RO 12-4-16 is a different product than the 5-12-26 that I currently use. I'm just trying to satisfy my frustration with how this grow has went. I'd like to stick with my autopots but seriously considering switching to DWC/RDWC.
I'm almost out of 5-12-26 and also considering trying another product, but not interested in giant nute schedules with 8 different products to use at different stages of plant life.
 
For your own interest btw, I emailed Premier Tech and the response I got was "The only cause that I can think of is the use of an acidifier to lower the pH of the water."
So I'm going to chalk it up to my initial thought of the issue being a unique mix of autopots/ebb and flow systems not removing standing acid and dumping tons of acid into my res to get my RO water down from 7.5PH to 5.7PH.
 
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