I have Ben's test kit with the combination PH and Chlorine tester. I have a hard time telling the difference between the shades of red. I can't tell for sure whetehr I have 7.2 or 7.8. Perhaps I'm partially color blind - maybe I'm just old.
Is there another tester available that would give a more definative result for PH in the 7.0 to 8.0 range? Is there a digital display type tester for PH?
Thanks.