What's your favorite test for PH?

[RedAnt78]

I've used IO and API and they're ok, but I have trouble distinguishing the differences between the colors. What ones do you guys like best?
Thanks!

 

[screamincamaro]

PH probe

Ph can fluctuate so much I can't see a test kit telling you much and as you mentioned they can be hard to read.

 

[CMcNeil]

PH probe

Ph can fluctuate so much I can't see a test kit telling you much and as you mentioned they can be hard to read.

+1 the probe on my ACJR

 

[Dyraxe]

Elos is good IMO