GH Trio RO and mag deficiency...

noob12345

noob12345

Well-Known Member
As the title says, This is my second grow using RO after multiple grows using hard water and the hardwater micro. I moved over to RO because my tapwater was so hard it was causing lockouts sometimes but im not getting the same explosive growth and some purple stems, even though the plants themselves look great, they are definitely slower vegging than when I was back in my tent using tapwater. I am filling another res with RO overnight and then I will either add cal-mag up to 0.2 EC or tapwater/RO mix up to 0.2 background before adding nutes. Anyone else had this experience? I am really beginning to think that the GH trio with RO needs a small boost of cal-mag.
 
rkymtnman

rkymtnman

Well-Known Member
noob12345 said:
As the title says, This is my second grow using RO after multiple grows using hard water and the hardwater micro. I moved over to RO because my tapwater was so hard it was causing lockouts sometimes but im not getting the same explosive growth and some purple stems, even though the plants themselves look great, they are definitely slower vegging than when I was back in my tent using tapwater. I am filling another res with RO overnight and then I will either add cal-mag up to 0.2 EC or tapwater/RO mix up to 0.2 background before adding nutes. Anyone else had this experience? I am really beginning to think that the GH trio with RO needs a small boost of cal-mag.
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if all you are having is just a Mg deficiency, use Epsom salts instead. 1gram per gallon will usually fix it. and you don't have the extra Ca and N that you get with Cal/Mg.
 
noob12345

noob12345

Well-Known Member
ok I will try! what about the slow growth or do you think iam just being impatient and got lucky a couple of times?
 
noob12345

noob12345

Well-Known Member
18/6 600hps but ive got it hanging vertical with rdwc tubs around them, ill go get a pic quickly
 
rkymtnman

rkymtnman

Well-Known Member
no issues with root rot too?

and you should try running 24/0 for veg on one of your upcoming grows. it will cut down on your veg time.
 
noob12345

noob12345

Well-Known Member
didn't get the one with the best root zone the photo is too dark for some reason but one has a better root zone, I did starve them at the beginning they were wanting 0.6-0.8 and I was running them at 0.4, keep getting ppm and EC mixed up its a right PITA if you press the button my accident! as soon as I bumped them up to 1.0 they have been going ok again just the slight purpling of the stems
 
Airwalker16

Airwalker16

Well-Known Member
Cali Magic is essential in RO. Make sure you mix it FIRST INTO the water. Stir.... Then add micro. Stir...then gro. Stir.... then bloom. You'll be fixed in a jiffy.
 
jimmy1life

jimmy1life

Well-Known Member
Couldn't the micro work. Also been wondering about say two part A B instead of Cal mag would bumping up 1st bottle A alittle extra say 50 or 100ppm. Solve the issue or would it add too much of something well Nitrogen.
 
Renfro

Renfro

Well-Known Member
jimmy1life said:
Couldn't the micro work. Also been wondering about say two part A B instead of Cal mag would bumping up 1st bottle A alittle extra say 50 or 100ppm. Solve the issue or would it add too much of something well Nitrogen.
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Heres is the thing with GH Three Part. It was developed in the 1970's to grow hydroponics. Cannabis tends to have different requirements especially when it comes to magnesium, it's more of a macro nutrient than a micro nutrient and it should be maintained in a proper ratio with calcium.

One way that a fella named Lucas figured out was to just use the micro and bloom since the micro has plenty of nitrogen. A ratio of 1:2 Micro:Bloom at your desired PPM.

Another way to go is to use calimagic.
 
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5BY5LEC

5BY5LEC

Well-Known Member
IMO if your using R.O. just count on always using calimagic all the time. Treat it like they are married. Not a lot but like 1ml a gallon or whatever to get you to .2ec. If you notice nitrogen issues drop the grow a bit. I would profess my love for GH Three part and calmag but I will spare you all.
Your plants look wilted but its just the bolts holding them down, I salute you for at least using grade 8.
 
noob12345

noob12345

Well-Known Member
5BY5LEC said:
IMO if your using R.O. just count on always using calimagic all the time. Treat it like they are married. Not a lot but like 1ml a gallon or whatever to get you to .2ec. If you notice nitrogen issues drop the grow a bit. I would profess my love for GH Three part and calmag but I will spare you all.
Your plants look wilted but its just the bolts holding them down, I salute you for at least using grade 8.
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I am also a keen advocate of GH some of my first grows were awesome, dialling in with RO seems more difficult though! photo of old grow underneath...as you can see they really went crazy and filled my tent, ive been struggling to get these same results since moving to RO and sealed CO2 grow. I have a French version of cal-mag that i used with success before but i stopped using it because it cause lockout with my hard tapwater (didn't know much about growing at that stage lol!), im filling a res with RO as we speak to do a res change!
 

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noob12345

noob12345

Well-Known Member
5BY5LEC said:
IMO if your using R.O. just count on always using calimagic all the time. Treat it like they are married. Not a lot but like 1ml a gallon or whatever to get you to .2ec. If you notice nitrogen issues drop the grow a bit. I would profess my love for GH Three part and calmag but I will spare you all.
Your plants look wilted but its just the bolts holding them down, I salute you for at least using grade 8.
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Grade 8? do you mean the pipework? I will take the bolts off once they hold lol, im doing some LST will be doing some topping also hopefully get some vertical scrog going
 
Renfro

Renfro

Well-Known Member
The 8.8 headstamp doesn't indicate a bolt grade, rather tensile strength. 8.8 = 116,000 (low end). 10.9 or 12.9 are stronger.
 
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