Can someone identify this for me?

[Vasdef]

Yes - K is potassium

Was your last grow the same strain as the current one?

It was either purple kush or super skunk. (Cat mixed the seeds up. He meant well)
This grow, Wedding Cake.

 

[FelipeBlu]

7.5ml/gal each of just the 3-part (no CalMag) provides:

165 ppm N
58 P
205 K
121 Ca
57 Mg

I like these numbers better.

 

[Moony]

If there's one piece of advice I can give is listen to @FelipeBlu !

He turned my grow around and me and him have really worked together to get a good mix together and even a new mix next run.

9 happy healthy plants. The colour is the lights. They are all a lovely deep green both tents are happy thanks to Felipe. Trust in him.

 

[Rexer]

Agreed, I'm at best intermediate level. FelipeBlu = pro level when it comes to this. I'd follow his advice in a heartbeat.

 

[Vasdef]

7.5ml/gal each of just the 3-part (no CalMag) provides:

165 ppm N
58 P
205 K
121 Ca
57 Mg

I like these numbers better.

Yeah, I dont know what happened. User error most likely. I just looked at the back of the bottle.
10ml of each GH nutes.
So you're suggesting omit the calmag for now?
Gonna dump the reservoir and get fresh nutes. Thanks !

 

[FelipeBlu]

So you're suggesting omit the calmag for now?

Yes - I think it’s just too much

 

[Vasdef]

Hey Rexer,
I'm not home right now, but what I can tell you is the Calmag bottle is the exact same shape, size as the hydroguard.
NPK? Never heard of it. My horns are still green over here.
I like that cooler idea. I'll be bouncing that idea in my noggin today.

Rexer,
To get your reservoir temps, are you using a chiller?

 

[Perfect Sun LED]

7.5ml/gal each of just the 3-part (no CalMag) provides:

165 ppm N
58 P
205 K
121 Ca
57 Mg

I like these numbers better.

I am not sure where you are getting these numbers from but I do not think they are right.

So based on the GH three-part series they list k20 as 11%. We need to convert that to K before in order to get the ppms of K added to a gallon of water.
To convert this is 11x0.83 = 9.13%. K = 9.13
We have to do something similar for P205 to P.
6 x 0.43 = 2.58%. P = 2.58%

To figure out how much ppm this adds to a gallon of water if we add 7.5ml of the 3 parts, we need to take 1000ml / 3.78L = 264. Now we can solve for ppm per gallon of water.

Then solve for ppm of K: 7.5ml x 9.13% x 264 = 180ppm
Solve for ppm of P: 7.5ml x 2.58% x 264 = 51ppm
N: 7.5ml x 7% x 264 = 138ppm
Ca 7.5ml x 5% x 264 = 99ppm
Mg 7.5ml x 2% x 264 = 39ppm

N 138ppm
P 51ppm
K 205ppm
Ca 99ppm
Mg 39ppm

I would like mag between 50-75ppm and calcium around 110ppm. Nitrogen is a bit low as well. P is great at 51,and K at 205. Adding a few ml of calmag will bring these numbers right in line. I would shoot for N 150ppm.

Your other numbers seem way off as well for his 5mL calmagic and 10ml 3 part series. For example, let's just take the K, which we know is 9.13%.

So 10ml x 9.13% x 264 = 241ppm. 241 is actually fine for mid to late flower.

So solve for calcium at 5ml per gallon of calimagic so 5% calcium, and then 10ml of the three-part series and also 5% calcium, we need to do the following. We can add the ml 5+10 and get 15ml

Then 15ml x 5% x 264 = 198ppm - that is getting a bit high, but not as high as you thought it was. Cannabis is a lot like tomatoes, which can handle a lot of calcium.

 

[Roy Growin]

I'm a techie kind of bloke, but all this ppm stuff does my head in
Don't measure it and it won't bother you
I put about half a splosh in a bucket and that's it, bit more if they look hungry

 

[Vasdef]

I am not sure where you are getting these numbers from but I do not think they are right.

So based on the GH three-part series they list k20 as 11%. We need to convert that to K before in order to get the ppms of K added to a gallon of water.
To convert this is 11x0.83 = 9.13%. K = 9.13
We have to do something similar for P205 to P.
6 x 0.43 = 2.58%. P = 2.58%

To figure out how much ppm this adds to a gallon of water if we add 7.5ml of the 3 parts, we need to take 1000ml / 3.78L = 264. Now we can solve for ppm per gallon of water.

Then solve for ppm of K: 7.5ml x 9.13% x 264 = 180ppm
Solve for ppm of P: 7.5ml x 2.58% x 264 = 51ppm
N: 7.5ml x 7% x 264 = 138ppm
Ca 7.5ml x 5% x 264 = 99ppm
Mg 7.5ml x 2% x 264 = 39ppm

N 138ppm
P 51ppm
K 205ppm
Ca 99ppm
Mg 39ppm

I would like mag between 50-75ppm and calcium around 110ppm. Nitrogen is a bit low as well. P is great at 51,and K at 205. Adding a few ml of calmag will bring these numbers right in line. I would shoot for N 150ppm.

Your other numbers seem way off as well for his 5mL calmagic and 10ml 3 part series. For example, let's just take the K, which we know is 9.13%.

So 10ml x 9.13% x 264 = 241ppm. 241 is actually fine for mid to late flower.

So solve for calcium at 5ml per gallon of calimagic so 5% calcium, and then 10ml of the three-part series and also 5% calcium, we need to do the following. We can add the ml 5+10 and get 15ml

Then 15ml x 5% x 264 = 198ppm - that is getting a bit high, but not as high as you thought it was. Cannabis is a lot like tomatoes, which can handle a lot of calcium.

Thanks for taking the time to come up with those numbers. Looking through your post, I might as well be trying to read Swahili. All that confuses the hell out of me, sorry.

 

[Perfect Sun LED]

Vas, yeah, no problem. I understand. That was for Felipeblu as proof of what is the accurate ppms. All you need to know is if you use 7.5ml of all three parts, the proper ppms you end up with are

N 138ppm
P 51ppm
K 205ppm
Ca 99ppm
Mg 39ppm

BTW, you can get better numbers using just Micro and Bloom, so you don't have to buy the grow, thus saving money. The lukas formula is pretty good, but the following is better. 10ml Micro and 16ml Bloom. This gives you the following ppms

N 132ppm
P 90ppm
K 161ppm
Ca 132ppm
Mg 63ppm
S 42ppm

You can use this for the whole grow. Just cut it in half with water for the beginning.

 

[Vasdef]

Vas, yeah, no problem. I understand. That was for Felipeblu as proof of what is the accurate ppms. All you need to know is if you use 7.5ml of all three parts, the proper ppms you end up with are

N 138ppm
P 51ppm
K 205ppm
Ca 99ppm
Mg 39ppm

BTW, you can get better numbers using just Micro and Bloom, so you don't have to buy the grow, thus saving money. The lukas formula is pretty good, but the following is better. 10ml Micro and 16ml Bloom. This gives you the following ppms

N 132ppm
P 90ppm
K 161ppm
Ca 132ppm
Mg 63ppm
S 42ppm

You can use this for the whole grow. Just cut it in half with water for the beginning.

Thanks PS!

 

[FelipeBlu]

I am not sure where you are getting these numbers from but I do not think they are right.

I use my own spreadsheet.

So based on the GH three-part series they list k20 as 11%

Yes, this is total K2O percentage, but see below re density.

We need to convert that to K before in order to get the ppms of K added to a gallon of water.
To convert this is 11x0.83 = 9.13%. K = 9.13
We have to do something similar for P205 to P.
6 x 0.43 = 2.58%. P = 2.58%

Yep, I considered the actual elemental percentages for K and P.

To figure out how much ppm this adds to a gallon of water if we add 7.5ml of the 3 parts, we need to take 1000ml / 3.78L = 264. Now we can solve for ppm per gallon of water.

Then solve for ppm of K: 7.5ml x 9.13% x 264 = 180ppm
Solve for ppm of P: 7.5ml x 2.58% x 264 = 51ppm
N: 7.5ml x 7% x 264 = 138ppm
Ca 7.5ml x 5% x 264 = 99ppm
Mg 7.5ml x 2% x 264 = 39ppm

N 138ppm
P 51ppm
K 205ppm
Ca 99ppm
Mg 39ppm

All of this is correct to this point. Except that it is essential to consider the density of the liquids to finish the calculations.

From the labels:
Micro density = 0.580kg/473ml
= 1.23
Grow density = 0.530kg/473ml
= 1.12
Bloom density = 0.550kg/473ml = 1.16

For this reason, it isn’t possible to combine the percentages of an element like K from each product. Each product analysis must be completed separately and the results then added together.

For example, the K (0.83 of K2O) for Micro is actually 20ppm, the K for Grow is actually 110ppm, and the K for Bloom is actually 76ppm. This results in a total K of 207ppm (I found an entry error in net weight of Grow in my spreadsheet - so K is 2ppm higher than previously calculated - thanks for making me look - I also discovered that I had erroneously entered 0.5% Mg for Micro).

I would like mag between 50-75ppm and calcium around 110ppm. Nitrogen is a bit low as well. P is great at 51,and K at 205. Adding a few ml of calmag will bring these numbers right in line. I would shoot for N 150ppm.

Your other numbers seem way off as well for his 5mL calmagic and 10ml 3 part series. For example, let's just take the K, which we know is 9.13%.

So 10ml x 9.13% x 264 = 241ppm. 241 is actually fine for mid to late flower.

So solve for calcium at 5ml per gallon of calimagic so 5% calcium, and then 10ml of the three-part series and also 5% calcium, we need to do the following. We can add the ml 5+10 and get 15ml

See above re density - percentages from different products cannot be combined.

Then 15ml x 5% x 264 = 198ppm - that is getting a bit high, but not as high as you thought it was. Cannabis is a lot like tomatoes, which can handle a lot of calcium.

5ml/gal of CaliMagic (density = 1.14kg/946ml = 1.2) = 5ml x 5% x 2.64 x 1.2 = 79ppm

You were close, Neil, but the numbers I provided are accurate.

 

[sstressed]

tan roots?

Thanks for taking the time to come up with those numbers. Looking through your post, I might as well be trying to read Swahili. All that confuses the hell out of me, sorry.

i tried hydro growing once. i got all the proper equipment. tried it once, lost the whole 8 plants by overfeeding , said F it and learned to love dirt.

 

[FelipeBlu]

Vas, yeah, no problem. I understand. That was for Felipeblu as proof of what is the accurate ppms. All you need to know is if you use 7.5ml of all three parts, the proper ppms you end up with are

N 138ppm
P 51ppm
K 205ppm
Ca 99ppm
Mg 39ppm

BTW, you can get better numbers using just Micro and Bloom, so you don't have to buy the grow, thus saving money. The lukas formula is pretty good, but the following is better. 10ml Micro and 16ml Bloom. This gives you the following ppms

N 132ppm
P 90ppm
K 161ppm
Ca 132ppm
Mg 63ppm
S 42ppm

You can use this for the whole grow. Just cut it in half with water for the beginning.

Many have followed the Lucas formula, but I wouldn’t advise doing this. The P is getting pretty high (I get 106ppm P for this) which can cause antagonistic effects wrt uptake of K, Ca, and Fe. Plus, too much P has been linked to excessive stem growth (greater internodal distance = leggy plants).

 

[Old Fart]

Wow! Sometimes i read a thread and realize how little I know!

 

[FelipeBlu]

Me too! Just different subjects lol

 

[Perfect Sun LED]

Felipe, I see that you are using percentage weight by weight, but most all nutrient bottles that have a percent listed, such as 5% N list it based on percentage of weight by volume. So K for Grow at 7.5ml is 98.6 ppm.

When growers need to know how much nutrient to use so that it gives them the correct ppm through 1/100 sprayers, they calculate based on weight by volume because that is how most all nutrients list their percents. It makes it easier for growers.
---
With the lukas formula and modified lukas formula the P does get a bit high at 90, considering anything over 30ppm hasn't shown cannabis to yield more, and only 11.5-20ppm of P is needed for the maximum potency of thc, cbd, etc.

However, 90 P is also not toxic. If anything, just a waste. Some newer studies even used 196 ppm P during weeks 6-10 with no ill effects.
February 8, 2021
Brian E. Whipker, Ph.D., Paul Cockson, Patrick Veazie, David Logan, and W. Garrett Owen, Ph.D

But they did say one thing I found interesting.

Higher P levels of up to 30 ppm P did result in larger plants and flower bud yield, but those flower buds had a lower cannabinoid concentration (most likely due to a dilution effect).

 

[Vasdef]

tan roots?

i tried hydro growing once. i got all the proper equipment. tried it once, lost the whole 8 plants by overfeeding , said F it and learned to love dirt.

Yes, the whole mass is a uniform tan.

 

[Perfect Sun LED]

Are you using peroxide or bleach in the water to prevent the roots from getting slimy? That could be why they are turning tan. I mean lack of using bleach or peroxide. Big grow ops use bleach because it is much cheaper.