Quick question about cannabis nutrients
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PerfectGrower
Well-Known Member
A buffer attempts to "lock" the pH at a desired level. The stronger the buffer, the longer the pH will hold.
MoodyShoes
Well-Known Member
I run hydro and in my humble opinion, if you need PH up and PH down, you're doing something wrong.
I only use PH down.
I only use PH down.
kachiga
Well-Known Member
So if I set ph of water first, add a buffer it will stay at that ph?
I know my ro water is about 7.1 after nutes are in I'm 6.5 and it holds strong till I break it with ph down.
We all make mistakes, rather have it then not
PerfectGrower
Well-Known Member
The pH up and down you use is not a buffer. It's a simple up or down correction. The buffers are coming from the nutrients you use (thus the decrease from 7.1 to 6.5 and holding).
kachiga
Well-Known Member
No no I understand that, that's not what I meant bud.
I'm growing on Soil+cork by Mill's DNA and using the nutes as well, all my plants are perfect except for one that has showed to be N sensitive and is currently displaying calcium deficiency after adding water with nutes which makes me think the real problem is that it is PH sensitive and the parameters are off.
I don't have a ph meter and please don't let me started with that, I'm not gonna buy one. What I do know is that the PH is about 7. So if we know that the PH is 7 and the plant is displaying calcium deficiency and ph problems then it is most likely experiencing low PH isn't it?
I want to solve this by adding Lime. The plant has 3 weeks to harvest, most likely I will get popcorn buds at this point but at least I want to try.
I don't have a ph meter and please don't let me started with that, I'm not gonna buy one. What I do know is that the PH is about 7. So if we know that the PH is 7 and the plant is displaying calcium deficiency and ph problems then it is most likely experiencing low PH isn't it?
I want to solve this by adding Lime. The plant has 3 weeks to harvest, most likely I will get popcorn buds at this point but at least I want to try.
MeJuana
Well-Known Member
pH UP/DOWN is a buffer guys. In most cases when we say pH Up or ph Down here we are referring Phosphoric Acid (Down) and Potassium Carbonate (up), chemical buffers, which both also contain plant food. But as stated some nutrients are buffers too. We should also realize there are organic solutions to pH as well if you are growing organically 100% or whatever but in fact organic solutions are also buffers.
Here's an awesome read on pH buffers:
http://scienceinhydroponics.com/2010/08/chemical-buffers-in-hydroponics-what-is-the-best-cheapest-buffer.html
Here's a whole list of awesome links I made for this person (There's a pH section there)
https://www.rollitup.org/t/hydrobuddy-free-hydroponic-nute-calc-by-chem-scientist-botanist-mix-own-nutrients.368514/
Here's an awesome read on pH buffers:
http://scienceinhydroponics.com/2010/08/chemical-buffers-in-hydroponics-what-is-the-best-cheapest-buffer.html
Here's a whole list of awesome links I made for this person (There's a pH section there)
https://www.rollitup.org/t/hydrobuddy-free-hydroponic-nute-calc-by-chem-scientist-botanist-mix-own-nutrients.368514/
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HydroRed
Well-Known Member
Always nute first, then ph. Some nutrient manufacturers have "buffers" in their nutrients that basically help stabilize the res so it doesnt flucuate. Some do-some dont.So if I set ph of water first, add a buffer it will stay at that ph?
Are your plants exhibiting any issues? Say for instance your plants begin having lockout issues, your plants will take up more water then nutes and will make your ppm and pH spike. Happens quick in hydro.
I'm growing on Soil+cork by Mill's DNA and using the nutes as well, all my plants are perfect except for one that has showed to be N sensitive and is currently displaying calcium deficiency after adding water with nutes which makes me think the real problem is that it is PH sensitive and the parameters are off.
I don't have a ph meter and please don't let me started with that, I'm not gonna buy one. What I do know is that the PH from the tap is about 7. So if we know that the PH is 7 and the plant is being grown in Soil+Cork displaying calcium deficiency and ph problems after adding nutes then it is most likely experiencing low PH isn't it?
I want to solve this by adding Lime. The plant has 3 weeks to harvest, most likely I will get popcorn buds at this point but at least I want to try.
MeJuana
Well-Known Member
Well you want to avoid stress and one stress is pH stress. If you don't buy a pH meter then you shouldn't add anything just the same water always. So you build an organic super soil, yes use a recipe with dolomite lime. Best thing to do 3 weeks from harvest is as little as possible to avoid stress, stall or worse. If you need to take action get some photos of the plant so we can see it
HydroRed
Well-Known Member
I grow hydro and dont know much about the soils out or what they have as for feed in them etc. I do know that if you are going to diagnose without checking pH of your soil runoff or even the water you feed with, you should read up on nutrient deficiencies and nutrient lockout and the things that cause them (like pH to name a few).
I cant say lime juice will help if you dont know with any certainty what the cause is for the one plants issue?
Are the leaves turning yellow?
Thanks, last time this happened I added water and it got much more better, then I added the nutes again, and again it got bad. So right now, it seems I might end up with popcorn buds on this plant but I'm just going to water it with no nutes until harvest see if it can give me more.
Thanks for the advice
Actually, maybe, this one I was watering it with the same amount as my other plants but my other plants are bigger and probably don't mind, so I should reduce the watering too.
I am watering every 3 days 700 ml each but I think I should reduce it.
I just read this:
http://stuffstonerslike.com/2014/11/nutrient-lockout-in-cannabis/
should I flush for 7 days?
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