Made by Insta-Test
This is a little red waterproof tub of test strips for testing your spa water, their are 4 little square tabs on each of the 50 strips that show results after dipping in the water.
Instructions included on packet.
50 x Pool and Spa Test Strips for Chlorine or Bromine
- Free Chlorine or Bromine
- Total Alkalinity
These Test Strips can be used with and brand of hot tub chemical to show the correct CL/BR, pH, Alkalinity or Hardness.