Thanks so much for the quick responses! I'd love to ask other questions, but I need to stay on topic.
However, for others also trying to understand pH and how to apply it to growing weed, I learned something today that I'll pass along.
In another pH thread someone recommended the Milwaukee PH600 digital pen sized meter for testing water. This unit is inexpensive $22-30 and apparently gets the job done. I was confused about the calibration solution for it because different sellers were offering different pH calibration products.
The unit has what is called "manual single-point calibration." This means you would only use the pH 7.01 solution for calibration. It also means the unit is only accurate for pH in the 6-8 range.
Most units have two-point calibration which is accurate to a wider range of pH and why you need to calibrate them with a pH 4.01 and 10.01 solution. Lastly, the probes need to be stored in a special solution to protect them. Apparently a pH 4.01 solution works for that.
I bought one and so I got some pH 4.01 to store the unit and 7.01 to calibrate it. I'm going to risk not checking TDS on my first soil attempt. Hopefully I won't regret it ;-)
However, for others also trying to understand pH and how to apply it to growing weed, I learned something today that I'll pass along.
In another pH thread someone recommended the Milwaukee PH600 digital pen sized meter for testing water. This unit is inexpensive $22-30 and apparently gets the job done. I was confused about the calibration solution for it because different sellers were offering different pH calibration products.
The unit has what is called "manual single-point calibration." This means you would only use the pH 7.01 solution for calibration. It also means the unit is only accurate for pH in the 6-8 range.
Most units have two-point calibration which is accurate to a wider range of pH and why you need to calibrate them with a pH 4.01 and 10.01 solution. Lastly, the probes need to be stored in a special solution to protect them. Apparently a pH 4.01 solution works for that.
I bought one and so I got some pH 4.01 to store the unit and 7.01 to calibrate it. I'm going to risk not checking TDS on my first soil attempt. Hopefully I won't regret it ;-)
