Pool Water Calculator - Water Testing

Rinse and fill chlorine/bromine (Cl/Br) cell to mark with water to be tested.
Add 5 drops OTO. Cap and invert to mix.
Match color in cell with a sanitizer color standard. Record as parts per million (ppm) total chlorine or total bromine.

See dosage chart on side of your preferred hth® sanitizer. To raise bromine level, follow directions on hth® Spa™ Brominating Tablets.

Test your pH

Rinse and fill pH cell to mark with water to be tested.
Add 5 drops PHENOL RED. Cap and invert to mix.
Match color in cell with a pH color standard. Record as pH units. If sample color is between two values, pH is average of the two.

See dosage chart on side of hth® pH increaser or hth® pH decreaser for adjustment.

Total Alkalinity (TA)

Test your Total Alkalinity

Rinse and fill sample tube to 25 mL mark with water to be tested.
Add 5 drops ALKALINITY INDICATOR. Swirl to mix. Sample should turn green.
Add ALKALINITY TITRANT dropwise. After each drop, count and swirl to mix until color changes from green to red.
Multiply drops in Step 3 by 10. Record as ppm total alkalinity.

See dosage chart on side of hth® alkalinity increaser or hth® pH decreaser for adjustment.

Total Hardness (TH)

Test your Total Hardness

Rinse and fill sample tube to 25 mL mark with water to be tested.
Add 5 drops HARDNESS INDICATOR. Swirl to mix. Sample should turn red is hardness is present.
Add HARDNESS TITRANT dropwise. After each drop, count and swirl to mix until color changes from red to blue.
Multiply drops in Step 3 by 10. Record as ppm total hardness.

See dosage chart on side of hth® calcium hardness increaser for adjustment.

Cyanuric Acid (CYA)

Test your Cyanuric Acid

Rinse and fill CYA dispensing bottle (#9191) to 7 mL mark with water to be tested.
Add CYANURIC ACID REAGENT to 14 mL. Cap and mix for 30 seconds.
Slowly transfer cloudy solution to CYA view tube until black dot on bottom just disappears when viewed from the top.
Read tube at liquid level. Record as ppm cyanuric acid.

See dosage chart on side as hth® stabilizer for adjustment.

Here Are Your Results and Recommended Solutions:

Test Your Water