My Journal Started As One Thing And Went Off The Rails Continued

Coco is technically hydro (sorta). So, yes; it requires feeding almost daily. There are some who feed twice a day. You have to be concerned about salts so there are multiple flushes, but I am liking the process very much!

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@garrigan62, @Donaldj, @latewood, a question about coco: what tds value would you like to see for plants in their 9th week of veg using GH grow, Armor Si, Floralicious and Cal mag + as their feeding regimen? I have only found conflicting answers. Everything from 900 ppm to 2,100 ppm.

Thank you for your help and advice.

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@rodri59, @Wishingilivedina420state, @GreenThunder, here’s a couple of shots of the SCROG. You can tailor the base for your pot size and everything is dry fit. No cement. The height is adjustable up 12" and the screws lock it in.

8 ea 1/2" pvc T’s, 4 elbows. 4 ea 3/4" T’s, 4 elbows. String and screws and tie wraps. The pvc cutter is worth it’s cost.


Very cool :sunglasses: @Myfriendis410 very cool. I wish I had more grow space for something like that.


This set up is brilliant @Myfriendis410! Already showed hubby your pics and we are going to try this for the next grow over the winter! Thanks for the pictures!!! :heart:


I would expect them to have ppm around 1100-1500 not much lower or higher


@Myfriendis410 Nice SCROG unit! I was thinking about using PVC for a SCROG, but wasn’t sure exactly how I would work it. It is awesome to see your design as it has given me some ideas. I have my cloth pots on metal shelves supported by 2’x4’s and aluminum pans underneath to catch run-off. Looking at yours, I realize I could use the SCROG assembly to hold the pots off of the tent floor.

It is not clear to me how you adjust the height. How does that work? Also, what are the SROG table dimensions?

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@Medforme, the SCROG is built on two sizes so the half inch slides inside the three quarter inch schedule 20 base. The screws lock it in place.

My actual screen is 24" X 36" to fit inside my box and allow me to carry them without help.



I have been a chronic over-feeder for around 3 yrs now. In over half a dozen systems, coco,soil, ebb n flo, deep water, shallow water, in or out.......

Enough with the what I do for certain know.

*Additives are not needed, other than a bloom booster, and zone/h202 to keep things clean

*Rhizo as a foliar, and once @ transplant at 2ml/gal

*Canna wants you to pour your money down the drain.

*Plants over/underfed have very similar traits.

*r/o water works but you must add cal-mag, and preferably a higher cal product like....

* replace cal-mag+ for the win!

*LESS IS MORE>......... .5 scale for those caring.
***200 ppm of a + b for plenty....
***400 ppm of a + b for flower is plenty.

***Calimagic/a+b ratio***
150 ppm/200 ppm = 350
100 ppm/3ooppm = 400
50 ppm/ 400 ppm= 450

* 5.8 ph*

* when charge, no double dose, and no flush....just absolutely water to 3o% run off.


plants can take extreme amount of abuse, overfeeding and mistreatment
Two runs ago I was feeding around 1200 ppm's and the plants took it without much signs of dislike....

Currently @ wk 4 with 10 strains all being fed the same soup.
@ 500 ppm total max solution.

hope this helps .

I’em going to give you my fle on PPM you can copy and paste to your files


Fertilizers PPM

To discover the ppm of your fertilizer mix, you will require being able to gauge grams
and liters. Come across at the nutrient 3 numbers written on the side of a fertilizer
package, these are the percentage substances of the nutrients in the fertilizer. Each
one gram of that fertili
zer in to one liter of water, this will give 10 ppm per percentage point of the given

Example a 20-20-20 nutrient gives (10 ppm x 20) or 200 ppm of every nutrient for each
gram in a one liter of water.


Grams of fertilizer per liter = A/B
A = your desired ppm
B = 10 ppm x the % of nutrient in mix or your ppm = C x B
B = 10 ppm x the % of nutrient in mix
C = gram of fertilizer per litter.

So to make create a 200 ppm to 100 ppm to 200 ppm NPK mix utilizing a 13-0-44
ratio of potassium nitrate, a 12-62-0 ratio of monoamonium phosphate, and a
33-0-0 ratio of ammonium nitrate you would work in reverse from your single
P and K basis (it makes it the simplest in this case), and create up the N at
the finish. I have rounded values to the nearest 0.1 g for the following. You
would utilize 0.5 g of potassium nitrate about 200 ppm/910ppm x 44k and 0.2 g
of mono-ammonium phosphate at about 100ppm/(10ppm x 62P) in one liter.

Fertilizers PPM

This would provide you 89 ppm N (10ppm x 13N x 0.5g + 10 ppm x 12 N X0.3g),
124 ppm P (10ppm x 62 P x 0.2), and 220 ppm k (10ppm x 44k 0.5g). 111 ppm is
necessary to elevate the N to 200 ppm level, so we can utilize 0.3g of the
ammonium nitrate (111 ppm/ (10 ppm x33N) to take us up to complete. The
concrete mixture would give away a 188 ppm N, 124 ppm P, 220 ppm K mixture
in one liter of water.

To obtain more accuracy, you require combining big batch or getting an
improved range. You would require to make 10 liter set of the over with
a range that is only precise to the gram. If you blend your own fertilizer,
you can regulate your N basis to meet up your ph requirements, rather than
relying on adding acid or base, which is good. This works for formulating
hydro mixes, as well as for us soil farmers.

PPM–EC conversion Chart

Re-printed with Permission from Jorge Cervantes;

EC Hanna Eutech Truncheon CF
ms/cm 0.5 ppm 0.64 ppm 0.70 ppm 0
0.1 50 ppm 64 ppm 70 ppm 1
0.2 100 ppm 128 ppm 140 ppm 2
0.3 150 ppm 192 ppm 210 ppm 3
0.4 200 ppm 256 ppm 280 ppm 4
0.5 250 ppm 320 ppm 350 ppm 5
0.6 300 ppm 384 ppm 420 ppm 6
0.7 350 ppm 448 ppm 490 ppm 7
0.8 400 ppm 512 ppm 560 ppm 8
0.9 450 ppm 576 ppm 630 ppm 9
1.0 500 ppm 640 ppm 700 ppm 10
1.1 550 ppm 704 ppm 770 ppm 11
1.2 600 ppm 768 ppm 840 ppm 12
1.3 650 ppm 832 ppm 910 ppm 13
1.4 700 ppm 896 ppm 980 ppm 14
1.5 750 ppm 960 ppm 1050 ppm 15
1.6 800 ppm 1024 ppm 1120 ppm 16
1.7 850 ppm 1088 ppm 1190 ppm 17
1.8 900 ppm 1152 ppm 1260 ppm 18
1.9 950 ppm 1216 ppm 1330 ppm 19
2.0 1000 ppm 1280 ppm 1400 ppm 20
2.1 1050 ppm 1334 ppm 1470 ppm 21
2.2 1100 ppm 1408 ppm 1540 ppm 22
2.3 1150 ppm 1472 ppm 1610 ppm 23
2.4 1200 ppm 1536 ppm 1680 ppm 24
2.5 1250 ppm 1600 ppm 1750 ppm 25
2.6 1300 ppm 1664 ppm 1820 ppm 26
2.7 1350 ppm 1728 ppm 1890 ppm 27
2.8 1400 ppm 1792 ppm 1960 ppm 28
2.9 1450 ppm 1856 ppm 2030 ppm 29
3.0 1500 ppm 1920 ppm 2100 ppm 30
3.1 1550 ppm 1984 ppm 2170 ppm 31
3.2 1600 ppm 2048 ppm 2240 ppm 32

There are three conversion factors which various manufacturers use for displaying ppm’s…

USA 1 ms/cm (EC 1.0 or CF 10) = 500 ppm
European 1 ms/cm (EC 1.0 or CF 10) = 640 ppm
Australian 1 ms/cm (EC 1.0 or CF 10) = 700 ppm

For example,

Hanna, Milwaukee 1 ms/cm (EC 1.0 or CF 10) = 500 ppm
Eutech 1 ms/cm (EC 1.0 or CF 10) = 640 ppm
Truncheon 1 ms/cm (EC 1.0 or CF 10) = 700 ppm



FANTASTIC WILL!! Thank you for the info. Exactly what I needed. It sounds like yesterday’s feeding at 710 ppm (1,425 NaCl) was heading in the right direction. I’ll continue with the Cal Mag+ as it’s hand watered coco but drop to 500-600 ppm to finish veg.

Still wrapping my (baked!) brain around EC. Finally able to GROK it. I’ll have to digest the rest later as it’s after 4:20 here now haha! @garrigan62



I know it’s alot of info. but f you save it to a file you can later use it as a reference base.



Here’s my journal @Medforme. @LV2GRW, @Alton66

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I would want to see a thriving mature female plant…Not in Coco…but that is another story. I hate Coco.

Not sure what kind of answer you are looking for. I guess I answered as best I could. :slight_smile:

Happy growing

Ok I’ll bite . Why do you hate coco @latewood


Wow that’s an Awesome grow you got going on.That pvc screen is awesome very nice design. Wish I could get my plant out in the sun. Anyway great skills you have there. I got turned off by coco when I started my first grow.loss some nice seedlings due to me getting the coco too hot,so I’m sticking with soil for now but I do go to coco I’ll come see you.Very nice plants I’m looking forward to the Jack Herer buds.Happy growing keep those pics coming!

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Tagging in @Precious. Not a whole ways back read what garrison wrote. I am using his advice, which works out to just under the minimum recommended package amount.

And @rodri59 here’s my journal Rodri. Hope you like it.

@bluntley420 I’m copying you to my journal because I am unable to move all of this over. Scroll up to Garrigan’s post on overfeeding.

Wow, is all I can say @Myfriendis410! Thanks for tagging me on your journal.

Let me just say that you did a great job on your grow. Great looking plants and consequential buds!!! :astonished:

Jack Herrer is probably my fave strain of all time and I hear nothing but good things about the Gold Leaf (especially for growing it). I’m also definitely going to be growing some Durban and Chocolope at some point.

My next grow will be some auto strains from ILGM indoors in soil. What’s next for you?

Playing catch-up brother. Looks like a happy place for sure! @Myfriendis410

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