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What is pH?

Weaselcracker

Nug of the Year: 2016 - Member of the Month: Sept 2015, Nov 2016 - Nug of the Month: Oct 2016 - Plant of the Month: May 2016
Re: Common household items for ph adjustment

Unless you have some extremely high ppm water, then it shouldn't really need ph adjusting anyway. The ph of a low ppm solution (as water should be) doesn't really matter much since it's easily shifted. But what matters in the end is what gets fed to the plant. So there wouldn't be any reason to adjust ph till you're at your final mix. If your water is so hard that it's causing precipitation or some sort of a bad reaction with your nutrients then it's best avoided anyway.
 

Slowpuffer

Well-Known Member
The Health Wiser meter cost $25. and can be kept dry. I checked mine with Cal. fluid and it was 4.20 with 4 cal and 7.0 with 7 cal.
Anyone know the cause of this.....
looks like nute burn or could be extremely low humidity ? Just a couple wild guesses.
 

Slowpuffer

Well-Known Member
Re: Common household items for ph adjustment

Unless you have some extremely high ppm water, then it shouldn't really need ph adjusting anyway. The ph of a low ppm solution (as water should be) doesn't really matter much since it's easily shifted. But what matters in the end is what gets fed to the plant. So there wouldn't be any reason to adjust ph till you're at your final mix. If your water is so hard that it's causing precipitation or some sort of a bad reaction with your nutrients then it's best avoided anyway.
How does hard water cause precipatation?
 

Weaselcracker

Nug of the Year: 2016 - Member of the Month: Sept 2015, Nov 2016 - Nug of the Month: Oct 2016 - Plant of the Month: May 2016
Re: Common household items for ph adjustment

After thinking/researching a little more.

It wouldn't.

I least I don't think it would.

My bad. I think? I was grasping at straws trying to think under what conditions it would ever be necessary to neutralize plain water before adding nutrients. And there may be reasons- I just can't think of any.

What lead me to saying that is- some things will precipitate out of the nutrient solution when facing an opposing ph. Pretty much all my nutrients are acidic. The only thing that isn't - is silica, and it loves to precipitate in an acidic solution so I add it first and hope for the best. My ph- and ph+ solutions also both precipate to some extent when facing an opposing ph. So- in trying to think of a reason why you might want to neutralize plain water before adding nutrients- precipitation was the only possible reason I could think of. But reading up on it more I don't find any info about calcium precipitating out of water in an acidic solution. And when I think about it more, it doesn't make sense that it would. But I'm not a chemist. As you can see
 

Slowpuffer

Well-Known Member
Re: Common household items for ph adjustment

After thinking/researching a little more.

It wouldn't.

I least I don't think it would.

My bad. I think? I was grasping at straws trying to think under what conditions it would ever be necessary to neutralize plain water before adding nutrients. And there may be reasons- I just can't think of any.

What lead me to saying that is- some things will precipitate out of the nutrient solution when facing an opposing ph. Pretty much all my nutrients are acidic. The only thing that isn't - is silica, and it loves to precipitate in an acidic solution so I add it first and hope for the best. My ph- and ph+ solutions also both precipate to some extent when facing an opposing ph. So- in trying to think of a reason why you might want to neutralize plain water before adding nutrients- precipitation was the only possible reason I could think of. But reading up on it more I don't find any info about calcium precipitating out of water in an acidic solution. And when I think about it more, it doesn't make sense that it would. But I'm not a chemist. As you can see
Well you're much closer to being a chemist, than I !! And this is why I'm paying thru the ass for nutrients. If I was a chemist, i'd start making nutrients. Must be pretty simple ??
By precipatation, I was thinking water coming out of the plants leaves. I find water drops on my plants, and couldn't figure out where the hell it came from . And you think the silica does that ?? I started using silica because It's supposed to build stronger stems & limbs ?
 

Cannabomb62

New Member
I use 7.0 calibration solution for storing my blue lab pen. I put a few drops in the lid after every use. The water on the leaves is because there isn't enough airflow going through the plants. If you don't have good airflow they will start to sweat and can cause mold.

CannaBomb62000000
 

Weaselcracker

Nug of the Year: 2016 - Member of the Month: Sept 2015, Nov 2016 - Nug of the Month: Oct 2016 - Plant of the Month: May 2016
As cannabomb said- it could just be high RH. I can't think of any other cause- I haven't seen that issue myself - and I have pretty high RH. But I'm not a botanist either.
Just a lowly weasel exterminator.
 

Cannabomb62

New Member
Heat can also cause them to sweat if you don't have a fan blowing over the canopy. You want your leaves to flutter and you won't have an issue with water developing in between leaves. You don't want your leaves to sit on top of each other.

CannaBomb62000000
 

UseMyName

New Member
I got a digital pH meter I just don't trust, NOT @ ALL

I can put it calibration solution 4.0, 7.0 & 10.0 and it reads right on the money, but in practical application it's off by a solid + 0.7. Granted it was a cheap-o on Amazon but WTF? How can it be so accurate in buffer solution an so inaccurate in application?

I use Indicator solution to check PH before adding noots. And I took a sufficient amount of chemistry (NOTE; before they let any one but the teacher have a digital pH meter ) so I know how to read indicator solution and test strips to know pH correctly

I do have a theory though, that it has something to do with the specific noots I use, HEAVY 16 I'm gonna call the 800# I think before I spend 4X as much on a new digital pH meter
 

PurpleGunRack

Well-Known Member
So what should the PH of soil be? Also how does this go for as far as fertilizer goes? Thanks!
Welcome to the Mag :Namaste:

The soil should be around 6,5, and the fertilizers work in different ways depending on brand.
Don't stress about getting the pH of the soil just so, it rarely matters a lot and the micro organisms in the soil will regulate the pH.
If you grow organically, soil and run-off pH aren't worthwhile to measure let alone to try to control.

I use Biobizz nutes and for everyday watering I just use 2ml organic lemon juice per liter water to go from around pH 8 to around pH 7 before adding nutes, that's it. I only check the pH like every 3-6 months in case something has changed in the tap water.

Happy growing :48:
 

Kingjoe83

Grow Journal of the Month: July 2017
I got a digital pH meter I just don't trust, NOT @ ALL

I can put it calibration solution 4.0, 7.0 & 10.0 and it reads right on the money, but in practical application it's off by a solid + 0.7. Granted it was a cheap-o on Amazon but WTF? How can it be so accurate in buffer solution an so inaccurate in application?

I use Indicator solution to check PH before adding noots. And I took a sufficient amount of chemistry (NOTE; before they let any one but the teacher have a digital pH meter ) so I know how to read indicator solution and test strips to know pH correctly

I do have a theory though, that it has something to do with the specific noots I use, HEAVY 16 I'm gonna call the 800# I think before I spend 4X as much on a new digital pH meter
Get advanced nutrients ph perfect issue solved. Lol

Topping and F.I.Ming your Cannabis plants - YouTube how to top and Lst.

my journal
Auto Flower NYC Diesel & Regular Feminized White Cookies Grow
 

Chris Scorpio

Member of the Month: July 2018
Using FFOF soil. Just transplanted to 1gal pots

Now am curious about my PH water.
Tap is about 7.5
RO from a dispence is at 6.2
Another dispencer is at 7.1


what water should I use.... im SOOOOOO Cornfused
 

Weaselcracker

Nug of the Year: 2016 - Member of the Month: Sept 2015, Nov 2016 - Nug of the Month: Oct 2016 - Plant of the Month: May 2016
They're both fine to use and probably both pretty much the same, which is -effectively neutral. As long as the ppm is low, meaning the water is quite pure, then the ph is basically a meaningless value and would be easily shifted by a drop or two of ph plus/minus
 

Eisenschwein

New Member
I do understand that promix hp is considered hydro. Therefor should get a ph of what? 5.5? What if it has been amended ? Will it make it soil and therefor a higher ph?
 

Eisenschwein

New Member
I do understand that promix hp is considered hydro. Therefor should get a ph of what? 5.5? What if it has been amended ? Will it make it soil and therefor a higher ph?
I thought with the amount of people who insist ph is so important (I do believe it is) there would be more responses. Oh well.
 

Weaselcracker

Nug of the Year: 2016 - Member of the Month: Sept 2015, Nov 2016 - Nug of the Month: Oct 2016 - Plant of the Month: May 2016
if you're using straight soilless then the ph range is about 5.6-5.9 or so. I'm pretty familiar with that scenario.

If you treat your soilless like soil and add amendments like compost, and lime and other minerals, then yeah your ph range will shift more towards the soil range. Not having first hand knowledge of that though, I didn't post on here the first time I read this.
 

Eisenschwein

New Member
if you're using straight soilless then the ph range is about 5.6-5.9 or so. I'm pretty familiar with that scenario.

If you treat your soilless like soil and add amendments like compost, and lime and other minerals, then yeah your ph range will shift more towards the soil range. Not having first hand knowledge of that though, I didn't post on here the first time I read this.
I added some lime, blood and bone meal and I added "fritted trace elements". That's why I'm a bit confused about the ph I should water with. Plants all looked good at the start till just about switch to flower. Now they all kinda look like lockout to various degrees. I checked my run off at 6.2 with my meter.
 
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