pH Testing

[cheshamjim]

I'm using the OTO/Phenol red testkit that came with Ben's testkit. Maybe I should try to find a better color comparator somewhere?

-Jim

[waterbear]

I'm using the OTO/Phenol red testkit that came with Ben's testkit. Maybe I should try to find a better color comparator somewhere?

-Jim

That's one of the best ones out there and I have found that the colors match up almost perfectly!. Hold the tube in front of a white background (the inside of the lid) in the sun a few inches in front of it.