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Week 6
To date I have only used perlite, general purpose compost and water pH'd to 6.5
When I pH my water I do it this way
Measure ph of water to be used and adjust to 6.5
Water plants then measure the pH of the run off water. This is necessary as it's the pH at the root that is important, not the pH being used.
If the pH is in the 6 - 7 range all is good.
If the pH is below 6 when watering next time, increase the pHby the values needed
Example
Water is at pH 6.5
Water plants and the run off is 5.5
Adjust next water to pH 7.5
Run off should now be ok. Doesn't need to be exact, slight changes are beneficial and aid certain nutes in the soil. As long as it's 6-7 for soil, I'm happy
I know this is obvious to some, but maybe useful
As I am using my tent for two other grows, the manifold gets 12 hours of 600W MH and 12 of 600W HPS