Please enter the six letters or digits that appear in the image opposite.
I have been using API test kits, including the pH tester, but I struggle to decide if the color I am seeing is 7.8 or 8.2... Obviously, the difference is significant. What digital meters would you folks recommend for my tired old eyes?
I use a probe on my RKL.
I don't have an RFL, I was kinda hoping for a handheld device of some kind. Anyone else have a favorite?
View Tag Cloud
Forum Rules