Hanna Instruments HI-711Total Chlorine Checker, 0.00 ppm to 2.50 ppm

I tested before and after a carbon filter. Results were as expected. It only come with chemicals for a few tests. Seems fairly accurate.

good product

I compared it to my old tester values are close this is more compact a lot more value for price. USPS did not listen to delivery request they did not put it on the front porch like requested.

Compared to the old wheel type I use to used and have to guess. This takes all the guessing out of it.

Does the job I need for less than half the price of more expensive devices