My question is this: Does the ph of your run-off water change if you run it through a paper towel/coffee filter/kitchen towel?

I ask this because as soil growers know, the run-off is usually tinted, which can throw off the results if you are using the liquid drops/colored chart ph test. I ran my run-off through a paper towel and it came out clear, after which I did the ph test. But, I wanted to make sure that the ph did not change because of the paper towel/coffee filter, etc...

Anybody with a ph pen tested before/after filtration?

I will eventually get my own ph pen, but my wife isn't too keen on me buying anymore expensive toys for a while... Thanks for the help in advance!
bigtopsfinn Reviewed by bigtopsfinn on . Any soil growers with a ph pen? Need some help... My question is this: Does the ph of your run-off water change if you run it through a paper towel/coffee filter/kitchen towel? I ask this because as soil growers know, the run-off is usually tinted, which can throw off the results if you are using the liquid drops/colored chart ph test. I ran my run-off through a paper towel and it came out clear, after which I did the ph test. But, I wanted to make sure that the ph did not change because of the paper towel/coffee filter, etc... Rating: 5