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Old 02-11-2012, 10:52 PM #1
Jabapc
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A question for the growers using Jacks 5-12-26

I'm about ready to start my first grow using Jacks hydro with cal nit.
my nute formula that I want to try is this per Gal.
2.5 grams Jacks
2.5 grams Cal Nit
1/2 gram epsom salt
1tsp Dyna Gro Pro Tekt

if I'm right about this it should give me ppm of

N P K Ca Mg S SI
135 35 190 125 59 61 90

how does it look and any suggestions

oh yeah I'm gonna wait on the Fulvic Acid untill I get this worked out Thanks
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Old 02-11-2012, 11:57 PM #2
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Quote:
Originally Posted by Jabapc View Post
I'm about ready to start my first grow using Jacks hydro with cal nit.
my nute formula that I want to try is this per Gal.
2.5 grams Jacks
2.5 grams Cal Nit
1/2 gram epsom salt
1tsp Dyna Gro Pro Tekt

if I'm right about this it should give me ppm of

N P K Ca Mg S SI
135 35 190 125 59 61 90

how does it look and any suggestions

oh yeah I'm gonna wait on the Fulvic Acid untill I get this worked out Thanks
As per Delta9, from the thread Passive Plant Killer (in my sig) 1 part jacks to .67 of calnit.. nuttin else.. I've run it RDWC and passive..

600ppms, period: I use it for veg and bloom.. >> in RO, 370ppms of jacks and fill to 600ppms w calnit. IMO, the more junk you add to the nutes, the more you'll have PH problems...
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Old 02-12-2012, 12:45 AM #3
YosemiteSam
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It has been a while since I used it but if your math is correct that looks really good with the possible exception of it being a little strong...but that is gonna depend on how much runoff you use. 20% runoff and you are probably good to go. I find that with mo runoff 100 ppm N is enough.

I like the addition of silicate.

Good luck.
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Old 02-14-2012, 05:53 PM #4
Jabapc
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Thanks Sam, I'll keep you all posted as how it goes.
right now my clones are a little slow rooting ,should have used the heating mat
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Old 02-14-2012, 06:23 PM #5
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Quote:
Originally Posted by Jabapc View Post
I'm about ready to start my first grow using Jacks hydro with cal nit.
my nute formula that I want to try is this per Gal.
2.5 grams Jacks
2.5 grams Cal Nit
1/2 gram epsom salt
1tsp Dyna Gro Pro Tekt

if I'm right about this it should give me ppm of

N P K Ca Mg S SI
135 35 190 125 59 61 90

how does it look and any suggestions

oh yeah I'm gonna wait on the Fulvic Acid untill I get this worked out Thanks
hi, mixing equal weight is wrong. their instructions show several ways to mix it.

they recommend equal volume.

however, as snook mentioned, the best way to mix is by ec or ppm.

you also won't need any magnesium sulfate, the base formula has over 6% magnesium.

i'm going to assume that you don't have a meter and that's why you are talking about mixing by weight.

if you take a 1/4 teaspoon plus a 1/8 teaspoon of each, 3/8 teaspoon total of each, you will get approx 750 ppm or ec 1.5. this is per gallon.

if you do have a meter, you don't need to measure water volume.

600 ppm is 360 ppm jacks and 240 ppm calcinit 240/360=.67

750 ppm is 450 ppm jacks and 300 ppm calcinit 300/450=.67

900 ppm is 540 ppm jacks and 360 ppm calcinit 540/360=.67

i cannot imagine a situation where you will need a solution stronger than this.

i have grown a 22.5 oz plant in a 3.5 gal container of coco with 600 ppm for life with no displays or problems, no additives or boosters or even ph adjusters.

if you mix it properly you won't have any ph issues.

the ratio is 1/.67 jacks/calcinit

d9
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Old 02-14-2012, 07:39 PM #6
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Thanks Delta9 .
I was going to start out with my formula at about half strength.
I grow in DWC,I have 2 tubs so I'll try yours in one and mine in one,I have no doubts about your formula only mine.
once again thanks for the info
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Old 02-17-2012, 12:01 PM #7
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Hey d9,

Why is mixing by EC better than by weight?
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Old 02-17-2012, 01:42 PM #8
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i felt like when i ran 1:0.67 jacks:calcium nitrate i ran into cal/mag deficiencies more, although not tooooo often. i ended up going back to 1:1 and have seen zero issues since. i use a tablespoon scoop of each for 5gal of RO water, i forget the ppm that ends up but i think it is somewhere around 850. i've used this with handwatered coco, handwatered sunshine #4, and ebb and flow coco.
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Old 02-17-2012, 06:52 PM #9
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Hey D9...I weighed out 3/8 of a tsp came out to almost exactly 2.5 grams of each Jacks and Cal Nit .. its about 2.3 actualy so that maybe what I go by seeing as I dont have an EC meter to measure EC..thanks again
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Old 02-17-2012, 07:10 PM #10
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Hey, it sounds like you guys may be confusing weight and volume. Japapc, 3/8 tsp of Jacks should (does) weigh more than 3/8 tsp of CalNit....this is because the Jack's is denser, more finely grained. Think of it like salt: a scoop of kosher salt weighs less than a scoop of table salt, because the shape of the kosher salt doesn't pack as densely....leaving more air space in the scoop.

Like d9 said above, the Jack's formula is designed to be applied in equal volume, not weight. As in, the same sized scoop of each. It's also nearly effortless, and is designed to be so. That said, applying extra CalNit may initially cause the plant to get nice and dark green, yet it deprives the plant of the other half of the formula.

I've found that diesel strains demand more mag than Jack's offers, but many strains do not.
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