Pentair Rainbow Test Reagent Solution #1 1oz OTO for TC Total Chlorine. For use in Pentair Rainbow 78HR OTO test kits.

Note: OTO test kits only test for Total chlorine and can not test for Free Chlorine or Combined Chlorine.

We suggest switching to a 78 DPD test kit for better testing results.

Most states do not allow OTO chlorine testing for commercial pools.

In store Sales Only - In store Pick Up Only

 California Residents WARNING: Cancer and Reproductive Harm

 www.P65Warnings.ca.gov