Tests for Biquanide, Total Alkalinity and pH.

Biquanide is a chlorine-free sanitizer such as Baquacil Chlorine-Free Swimming Pool Sanitizer and Algistat, BaquaSpa Sanitizer, SoftSwim Bactericide, PolyClear MaxiPolish Swimming Pool Sanitizer and Algistat, or Revacil Swimming Pool Sanitizer.*

AquaChek Blue uses a two-part test. First you dip the strip and check the Total Alkalinity and pH. Then you re-dip the strip, moving it back and forth underwater for 30 seconds, to test the Biquanide level.

To keep your pool or spa water at its best, test a minimum of once a week! It's also a good idea to write down your results each time you test.

Comes with complete instructions. 25 strips per bottle.

*Baquacil and BaquaSpa are trademarks of Arch Chemicals, Inc. SoftSwim is a trademark of Bio-Lab, Inc. PolyClear MaxiPolish is a trademark of Alden Leeds, Inc. Revacil is a trademark of Mareva, Inc. Use of these trademarks does not imply endorsement.