Measuring pH with a pH pen
Using a pH pen is actually one of the most precise ways to do it since you can get the level to the decimal. Although you must make sure you keep the pH pen in the water for a couple minutes in order for it to adjust, and you want to stir your nutrients in the water before hand. Here’s what we’re going to cover:
What is a pH pen
A pH pen is an electronic device created to measure the level of pH in a solution. More precise than pH drops or strips, it measures the levels through a sensor that is placed at the bottom of the pen and shows the levels on a small screen.
You can check out the Wikipedia page on pH meters, it covers the different advancements and types of meters that exists out there. In case the pH pen isn’t working properly, meaning that in tampon solutions it shows you pH levels that are off, you can recalibrate it by turning the small screw at the bottom of the pen. Normally a screw driver at the right size is provided.
You can buy pH pens at many different locations on the web, just do a quick Google search on the subject, or go to your local grow shop, it’ll cost you less than $20.00 and will enable you to avoid so many problems with your cannabis plants!
How to use a pH pen step by step
Let’s go through testing your watering mix using a pH pen step by step:
- Place all the nutrient into your water.
- Stir or gently share your mix. Be careful not to shake it strongly, oxygenating the water will raise the pH.
- Place the pH tester into the water and wait a leat a minute.
- Once the number showing up has stabilised your know the pH level!
- If it’s too high add some pH down, on the contrary if it’s too low add some more water to your mix.
(for pH down you can use lemon juice or other acidic elements)
- If you’ve added pH down or some water go back to step 3. Quick tip, in 2L of water 1 drop of pH down brings down the pH of about 0.1
- Shake it up to get oxygen into the water (the roots will love it) and get to watering!
And there you go! you know know how to measure the pH level in your watering mix. If you shake on step 2 just keep in mind that the actual pH of the water is lower than what’s showing