How to stabilize the PH?

[Sattiv]

if the correction is in the range 0,1-0,3 nothing to worry about.
Your ladies are too young to make any correction. Wait until the next res change and see what happen.
Try to follow this schema.

View attachment 5014477

Have an happy grow !

I don't know why the leaves are turning inside like this. PH almost 5,75 EC 710ppm water temp 25ª they have about almost 3 weeks they are watered 15 minutes hour a hour. Everyday the PH changes 5,75 to 6,75

 

[Johiem]

here you should follow this chart
View attachment 5014619

Please explain the chart. Temperatures are a given, but what are the percentages up top? Are those supposed to be Ph ranges?

 

[Wastei]

Potassium silicate will help a lot to keep pH stable and cause good cation exchange. I aim for 20-30ppm of silica in solution.

You have products like Protekt from Dyna Gro or Agsil16H if you want salt based and make your own solution.

We have "Kaliwasserglass" locally, that's 36% potassium silicate in solution. Used for impregnating concrete. I think Protekt is 10% Si if I remember correctly.

 

[1212ham]

Please explain the chart. Temperatures are a given, but what are the percentages up top? Are those supposed to be Ph ranges?

% of relitive humidity. It's a vpd chart, vapor pressure deficit.

 

[Johiem]

% of relitive humidity. It's a vpd chart, vapor pressure deficit.

That makes more sense.

 

[Richalpha]

You want it to drift between 5.5-6.2.
If your ph falling to fast you are probably over feeding them, if its rising to fast you may need to feed them more, that chart above is very helpful.