I use the @VIVOSUN 3 in 1 ph- ppm- temp meter white.Looking for a good quality PH tester, the new vivosun yellow is working but it was like $13 for it and a tds meter. What are you all using to test PH? I see vivosun has a better, Milwaukee replaceable prob $40, ac infinity $50 or with interchangeable probe $80.
T/u
I've found it quite durable and accurate.
It's lasted longer than any other I've used.
Stay safe
Bill284