Help run off ph comming out lower then inlet ph running royal gold tupar

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Thomahawk

Member
Feeding mills line with 1.2ml cal mag from tps per gal comes out to 800 ppms i ph to 6.1-6.3
Run off is allways 700/900ppms but my ph comming out is has been 5.4/5.6 I know this isn’t that far off my the drop between the in and the out is rather concerning and seems to me a sign of something getting ready to go wrong
Ppms are on the ppm500 scale allways plenty of run off fed daily never dries out maybe leas the a centimeter at the top , alll the tops of my plants look great and supper healthy but som off the bottoms is supper light and kinda burned but not crispy like burnt tips from nutes
 

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Tll7

Active Member
It means your soil is a little acidic. Your 6.3 ph water runs through your soil (probably around 5 ph) and becomes a more acidic 5.6 ph. You can water your plant with a more basic ph to balance out the difference. A 6.8 ph solution would end up being around 6 - 6.1 ph after going through the soil.

Your plant may be yellowing on the bottom due to nutrient lockout if the ph has been off for a while or another nutrient problem. Are you only feeding cal mag? What soil are you using? If it isn’t an organic super soil you probably need additional nutrients by now. Also, you shouldn’t be water your plant daily unless it is in coco. You say it never dries out more than a centimeter. Cannabis requires the root zone to dry out between watering. I don’t water until my finger goes completely into the soil and it isn’t moist. You can also tell when the root zone has dried out a bit by lifting the pot right before you need to water to see how heavy it is.
 
T

Thomahawk

Member
Tll7 said:
It means your soil is a little acidic. Your 6.3 ph water runs through your soil (probably around 5 ph) and becomes a more acidic 5.6 ph. You can water your plant with a more basic ph to balance out the difference. A 6.8 ph solution would end up being around 6 - 6.1 ph after going through the soil.

Your plant may be yellowing on the bottom due to nutrient lockout if the ph has been off for a while or another nutrient problem. Are you only feeding cal mag? What soil are you using? If it isn’t an organic super soil you probably need additional nutrients by now. Also, you shouldn’t be water your plant daily unless it is in coco. You say it never dries out more than a centimeter. Cannabis requires the root zone to dry out between watering. I don’t water until my finger goes completely into the soil and it isn’t moist. You can also tell when the root zone has dried out a bit by lifting the pot right before you need to water to see how heavy it is.
Click to expand...
I’m in royal gold. Tupar , Coco not soil
Coco is not suposed to dry out And I’m feeding the whole mills line of nutrients with added 1ml per gal of cal mag my watering practices are adequate Everything’s in optimal range , just my first time in coco is it regular for it to dip like that , should it be supplement with Dolomites lime like a soil etc or does it not work well is more along the lines of info I need is their something else I should mix in the medium ?? Are you experienced with coco ? Appreciate the response
 
TintEastwood

TintEastwood

Well-Known Member
Thomahawk said:
I’m in royal gold. Tupar , Coco not soil
Coco is not suposed to dry out And I’m feeding the whole mills line of nutrients with added 1ml per gal of cal mag my watering practices are adequate Everything’s in optimal range , just my first time in coco is it regular for it to dip like that , should it be supplement with Dolomites lime like a soil etc or does it not work well is more along the lines of info I need is their something else I should mix in the medium ?? Are you experienced with coco ? Appreciate the response
Click to expand...
Grow looks really nice.
What size/type pots are you using? How often do you feed?

I never check the runoff PH, only ppm. They have some info here.
www.cocoforcannabis.com

How to Measure and Adjust pH - Coco For Cannabis - Plant Science

Learn how to measure and adjust the pH of your nutrient solution for cannabis. We explain the science of solubility and why pH matters!
www.cocoforcannabis.com www.cocoforcannabis.com

If needed, I use a PH probe to check the coco ph.


 
xtsho

xtsho

Well-Known Member
If your plants are healthy like they look to be one of the quickest ways to change that is to start messing around. The runoff pH seems to be bothering you more than the plants. What kind of pH meter are you using?

I'd just worry about what you're putting in not what's coming out.
 
P

piratebug

Well-Known Member
There doesn't seem to be anything really wrong with them, but usually when you have a +0.5 pH drop or greater in a coco based medium it means the pots have some salt build up, due to one not consistently using a large enough percentage for their runoff. Anyhow, for me, say i am running 3 gallon pots, I have found that I have to give each pot 1 gallon of water / feed so the pot get fully saturated, and I end up with around 20% runoff / 25 or so ounces of runoff which keeps the pH in my pots always the same throughout my pots.
 
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T

Tll7

Active Member
Thomahawk said:
I’m in royal gold. Tupar , Coco not soil
Coco is not suposed to dry out And I’m feeding the whole mills line of nutrients with added 1ml per gal of cal mag my watering practices are adequate Everything’s in optimal range , just my first time in coco is it regular for it to dip like that , should it be supplement with Dolomites lime like a soil etc or does it not work well is more along the lines of info I need is their something else I should mix in the medium ?? Are you experienced with coco ? Appreciate the response
Click to expand...
Sorry Thomahawk, I was pretty high last night and completely missed that you mentioned your substrate and nutrients. I haven’t grown in coco yet so I won’t be much help. I know that coco needs to be buffered before growing in it which you may or may not have done. I’m sure someone else can give you better advice than me. Good luck with the grow! Despite the ph your plants look great!
 
Star Dog

Star Dog

Well-Known Member
If it's coco the science behind it (apparently) is something to do with cation exchange sites, but in layman's terms it's normal for a period anyway, I don't monitor the run off meticulously enough to say for how long?
 
Billybongthornton613

Billybongthornton613

Member
In drain to waste coco reading your run off ph will make you chase your tail. Reading ec/ppm is necessary tho. If your plants are fine don’t worry so much about root zone ph. If you ppm of run off is over 150ppm from your input fertigate more often or at higher volumes. Make sure u get a good 10-20% run off. The best way to correct in DTW is to “flush” with the correct solution at correct ec/ppm and ph. I NEVER give plain water in DTW.
 
Billybongthornton613

Billybongthornton613

Member
TintEastwood said:
Grow looks really nice.
What size/type pots are you using? How often do you feed?

I never check the runoff PH, only ppm. They have some info here.
www.cocoforcannabis.com

How to Measure and Adjust pH - Coco For Cannabis - Plant Science

Learn how to measure and adjust the pH of your nutrient solution for cannabis. We explain the science of solubility and why pH matters!
www.cocoforcannabis.com www.cocoforcannabis.com

If needed, I use a PH probe to check the coco ph.


Click to expand...
Coco for cannabis is a great site. this too
www.cocoforcannabis.com

How to Manage Run-off EC - Coco For Cannabis

Learn how to manage Elelctrical Conductivity (EC) in your coco grow. Simple instructions how to control EC to maximize growth & keep plants happy & healthy!
www.cocoforcannabis.com www.cocoforcannabis.com
 
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