The tale of two ph pens

[bdeegan]

Thank you for this post! A new ph pen is my next upgrade. It’s hard to make a decision on one without solid reviews, so well timed and much appreciated.

[dmpmfd]

Just wondering if anyone has tested/used the AC Infinity Ph tester & if it just another "cheap" non-accurate pen or something to consider? I realize this is an old posting but was curious of the forum's opinion.

[golfnrl]

I started off with a Hannah pen. It worked great until I let it dry out. Switched to Blue Labs. I have an EC pen, PH pen, and two PH controllers, one for each rez. The Hannah was good but I like the Blue Labs PH pen better just because of the features. The 30 day recal reminder is cool. Both the PH pen and controllers have that feature. I have not used test strips to measure PH.

[changeofpace2014]

So I was using Hannah PH and EC meters. Both have been replaced at least once if not twice and were not talking high use. Finally I got tired of buying junk and went the Blue labs EC meter first and finally ponied up for there PH meter. Been Happy..

I keep forgetting Blue Labs requires two reference solution to calibrate the PH meter.. Twice now I have gotten really stressed out because it would not take the 4.0 and kept showing er.. Both times I finally realized one needs to sets 7.0 first then the 4.0 reference solution will take..

It is a big deal if you grow hydro and either meter goes wonky..unless you have a spare..

[Smallgrow]

You can even do 3 solution cal with the BlueLabs , can’t remember why you would. I think maybe if your testing very high PH, cause the third cal solution is 10 if I’m not mistaken