Aquachek Yellow Test Strips test for free chlorine, pH, Alkalinity and Cyanuric Acid (Stabilizer). Just dip an AquaChek Yellow strip in your pool or spa water for one second and remove it immediately. You get test results in seconds! To keep your pool at its best, test at each end a minimum of twice a week, and test your spa before each use. It’s also a good idea to write down your results each time you test. Comes with complete instructions. 50 strips per bottle.

Just dip an AquaChek Red Strip in your spa or pool water for one second and remove it immediately. You get test results in seconds! Aquachek Red tsts pH, Alkalinity, Bromine and Hardness To keep your spa at its best, test the water before each use. (Two bathers in a 400-gallon spa are the equivalent of 150 swimmers in a 20,000-gallon pool!) Test your pool at each end a minimum of twice a week. It’s also a good idea to write down your results each time you test. Comes...

Biguanide 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 Biguanide level. To keep your pool or spa...

Borate is a commonly used swimming pool chemical for buffering water and aiding in water balance. These test strips test borate levels at 0, 15, 30, 50, and 80 parts per million. 25 strips per bottle.

Tests: Total Copper

Tests: Monopersulfate, (monopersulfate is an oxidizer used in mineral purification systems such as Frog & Nature 2), pH & Total Alkalinity

Tests: Salt (400 - 7,000 ppm) (mg/l). For salt pools with chlorine generators.

Tests: Nitrate & Nitrite

The AquaCheck Select Refill Kit is a refill for the Select Test Strip Kit. Includes 50 strips and new insert for the reusable color comparator. The Select strips test for total hardness, total chlorine, total bromine, free chlorine, pH, total alkalinity and cyanuric acid (stabilizer).

Includes: Reusable Comparator & Treatment Book. Tests: Total Chlorine, Free Chlorine, Total Bromine, Total Alkalinity, pH, Total Hardness and Cyanuric Acid.

Tests: Total Iron

Tests: Total Bromine, Total Chlorine, Free Chlorine, Total Alkalinity, pH, Total Hardness and Cyanuric Acid.