• We are officially moved over to Discourse.
    Autoflower Discourse"
    You will have to create a new login for the new site!
    This current Xenforo-based forum will be preserved as a read-only archive going forward with efforts to better categorize and tag original and canonical content.
    The URL autoflower.org will soon point to the new Discourse site; so we'll be back to business in a few days!
    Send Son of Hobbes a private message if you have any questions!

FFO PH help

Joined
May 17, 2021
Messages
7
Reputation
0
Reaction score
2
Points
0
New grower and I have a question. Growing in fox farm ocean using tap water. PH going in is 7.2. Now when I do a runoff I get 5.0. I don't understand why.
 
When you water a pot, the water combines with CO2 to make a weak acid called carbonic acid. The weak carbonic acid ionizes and releases hydrogen and bicarbonate. The hydrogen ions cause soil particles to release calcium ions from soil particles.
As the amount of hydrogen ions in the soil increases the soil pH decreases thus becoming more acidic.
In your case, it could be the FF Ocean may have been acidic to start with and the water's pH is overwhelmed by the soil's pH.
Also with the smaller the amount of soil the less buffering of carbonic acid happens.
If you have some leftover FF Ocean you could put a tablespoon of the soil in 2 tablespoons pH neutral water. Bottled water such as Evian or Fiji have a pH of 7.0. Swirl it around and check the pH. Some cheaper bottled water such as Deer Park has a pH of 5.5.
 
Last edited:
Back
Top