Features:

The Insta-Test 4 pool & spa strip measures Free Chlorine 0-10 ppm (or Bromine 0-20 ppm), pH 6.2-8.4, Total Alkalinity 0-240 and Total Hardness 50-800 ppm.

• Swirl-n-read strip
• Instant results
• 50 strip bottles

Ideal for spa owners who need the most critical tests for perfect water balance.