Chemical Ranges

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The following charts will display proper chemical ranges for your hot tub and pool. This is meant as a reference only. If you are having difficulty maintaining your water clarity or balance please feel free to bring us a water sample for FREE Water Testing and we can help you get back to clarity and a relaxing soak in crystal clear water.

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Ideal Ranges

Free Chlorine1.0 – 3.0 ppm
Combined Chlorine0.00 – 0.05 ppm
Total Chlorine 1.0 – 3.0 ppm
 **With water purification 0.6 – 1.0 ppm
Bromine3.0 – 5.0 ppm
Alkalinity 80-120 ppm
pH7.2 – 7.8
Calcium Hardness200–350ppm*
Stabilizer (Cyanuric Acid)30–70ppm
Salt Level (Zodiac)3000 – 3900 ppm
Copper0.00 – 0.03 ppm

*Calcium Levels should be on the higher end in Concrete Pools.
*Calcium Levels should be on the lower end in Salt Pools.

Relative pH of Chemicals


Unstabilized Granular Chlorine (HTH EXTRA)11.5
Unstabilized Liquid Chlorine12.5
Stabilized Granular Chlorine6.0
Stabilized Chlorine Tablets3.0
Bromine Tablets4.5


pH Up11.3
pH Down1.4


Algaecide 40-60%6.5
Algaecide 5-10%7.0
Stain and Scale Control5.0
Vinyl Tile and Liner Cleaner10.5
Filter Cleaner1.6
Pool Line Anti-Freeze8.5

Making Chemical Adjustments

 To IncreaseTo Decrease
ChlorineUnstabilized Granular or Liquid ChlorineDilute the pool water Keep the pool surface exposed to allow burn-off
AlkalinityAlkajusterDilute the pool water
pHpH UppH Down
CalciumHyCalDilute the pool water
SaltAdd SaltDilute the pool water
Copper/IronN/AIf Stain Erase does not work:
– Dilute the pool water
– Stain and Scale Control
– Natural Chemistry Products
BromineBromine T ablets OxidizerDilute the pool water

When doing a series of adjustments, make sure to adjust pH levels first, then alkalinity.

Always add the chemical to the water, never the water to the chemical!