Hi Nvus
I let my water sit for at least 24 hours to let the chlorine evaporate. I add my feed first and PH last.
PH will pretty much make or break a grow so it's a really good idea to get that part of it under control.
It's soil PH that you want to worry about - obviously water in has an impact on this, but it's the relationship between the water IN PH and the water OUT PH that should be guiding you to your soil PH.
So - if you water in at 6.5 and it comes out at 6.5, you're golden! ^_^
here's a post from GoAuto that i love to re-post
Rough Calculation Guide (by GoAuto):
I let my water sit for at least 24 hours to let the chlorine evaporate. I add my feed first and PH last.
PH will pretty much make or break a grow so it's a really good idea to get that part of it under control.
It's soil PH that you want to worry about - obviously water in has an impact on this, but it's the relationship between the water IN PH and the water OUT PH that should be guiding you to your soil PH.
So - if you water in at 6.5 and it comes out at 6.5, you're golden! ^_^
here's a post from GoAuto that i love to re-post
Rough Calculation Guide (by GoAuto):
Here's some good info on ph.....
If your runoff pH is higher than your starting pH, use this equation to determine your soil pH:*
Soil pH = Runoff pH + Difference
If your runoff pH is lower than your starting pH, us this equation:
Soil pH = Runoff pH - Difference.
For example, say your the starting pH of your solution before it goes in is 6.5 and the pH of your runoff is 7.0. The difference is +0.5, so using the above equation:
Soil pH = 7.0 + 0.5*
Soil pH = 7.5
If your starting pH is 6.5 and your runoff is 6.0, your difference is -0.5 and using the above equation:
Soil pH = 6.0 - 0.5
Soil pH = 5.5
If your runoff pH is higher than your starting pH, use this equation to determine your soil pH:*
Soil pH = Runoff pH + Difference
If your runoff pH is lower than your starting pH, us this equation:
Soil pH = Runoff pH - Difference.
For example, say your the starting pH of your solution before it goes in is 6.5 and the pH of your runoff is 7.0. The difference is +0.5, so using the above equation:
Soil pH = 7.0 + 0.5*
Soil pH = 7.5
If your starting pH is 6.5 and your runoff is 6.0, your difference is -0.5 and using the above equation:
Soil pH = 6.0 - 0.5
Soil pH = 5.5





