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hth Spa™ is committed to quality and satisfaction, and we want to help you get the most from your spa. With our full line of spa products, you can have peace of mind knowing that your spa is ready when you are. Here you'll find all the information you need to care for your spa all year long.

No matter what the occasion, we at hth® Water Products want to help you get the most from your spa.  We are committed to quality and satisfaction. With our full line of water treatment solutions, you can have peace of mind knowing that your spa is ready, offering you clear, sparkling enjoyment everyday. Here you'll find all the information you’ll need in order to care for your spa all year long.

Balanced Water

To ensure your water is balanced we have created the following chart with suggested hth Spa™ Care Products, which deliver optimal product performance, comfort and crystal clear water.

PARAMETER WHAT IS IT? WHEN TO TEST IDEAL RANGE PRODUCT USED TO
ADJUST LEVELS
pH A measure of the water's acidity Every day 7.2-7.6 when using chlorine 7.2-7.8 when using bromine

hth Spa™ pH Increaser or hth Spa™ pH Decreaser

Free Available Chlorine (FAC) The amount of active chlorine in the water Every day 3-5 ppm when using chlorine

hth Spa™ Clear Chlorinating Sanitizer and hth Spa™ Non-Chlorine Shock Oxidizer

Bromine residual The amount of bromine sanitizer in the water Every day 2-4 ppm when using chlorine

hth Spa™ Brominating Tablets

Total Alkalinity (TA) The water's ability to keep pH at a proper level Once a week 60-120 ppm

hth Spa™ pH Decreaser

Total Hardness (TH) The amount of dissolved calcium in the water Once a week Acceptable: 200-800 ppm, Ideal: 200-500 ppm
pH
What Is It? A measure of the water's acidity
When To Test Every day
Ideal Range 7.2-7.6 when using chlorine 7.2-7.8 when using bromine
Product Used
to Adjust

hth Spa™ pH Increaser or hth Spa™ pH Decreaser

Free Available Chlorine (FAC)
What Is It? The amount of active chlorine in the water
When To Test Every day
Ideal Range 3-5 ppm when using chlorine
Product Used
to Adjust

hth Spa™ Clear Chlorinating Sanitizer and hth Spa™ Non-Chlorine Shock Oxidizer

Bromine residual
What Is It? The amount of bromine sanitizer in the water
When To Test Every day
Ideal Range 2-4 ppm when using chlorine
Product Used
to Adjust

hth Spa™ Brominating Tablets

Total Alkalinity (TA)
What Is It? The water's ability to keep pH at a proper level
When To Test Once a week
Ideal Range 60-120 ppm
Product Used
to Adjust

hth Spa™ pH Decreaser

Total Hardness (TH)
What Is It? The amount of dissolved calcium in the water
When To Test Once a week
Ideal Range Acceptable: 200-800 ppm, Ideal: 200-500 ppm
Product Used
to Adjust

Opening Your Spa

If you use Chlorine you should:

Balance:
Test and adjust the total alkalinity, calcium hardness and pH of the water. For recommended ranges, please refer to the Balanced Water Chart.

Sanitize:
Broadcast hth Spa™ Chlorinating Sanitizer over the surface of circulating water. Measure and adjust the free available chlorine (FAC). For startup, do not enter the spa until the FAC level is in the range of 4 - 5 ppm. FAC levels should be maintained in the range of 3 - 5 ppm.


If you use Bromine you should:

Each time your spa is freshly filled with water you will need to add one-half ounce of hth Spa™ Brom-Start per 100 gallons of water to establish an immediate 30 ppm bromide reserve. The bromide reserve keeps the system completely bromine based, to eliminate odors and to ensure maximum water comfort to skin and eyes. The 30 ppm bromide reserve is not the same as the 2 – 4 ppm bromine level that must be maintained on a daily basis. Any time the spa is drained and refilled hth Spa™ Brom-Start will need to be added.

Balance:
Test and adjust the total alkalinity, calcium hardness and pH of the water. For recommended ranges, please refer to the Balanced Water Chart.

Sanitize:
Add hth Spa™ Brominating Tablets to the floater (fits all floaters). Test and adjust the bromine residual. Do not enter the spa until the bromine residual level is in the range of 2 – 4 ppm. Bromine levels should be maintained in the range of 2 – 4 ppm.

To convert your spa from bromine to chlorine or vice versa, simply drain your spa and refill it with fresh water.

hth spa™ Clear Chlorinating Sanitizer
HTH Spa chlorinating sanitizer
Routine Cleaning

Maintaining your spa is important for keeping your spa water safe and free of problems. Spas operate at a high temperature (up to 104º F/40º C), which can create a high rate of water evaporation and an environment that may promote the growth of bacteria and algae. Heavy use of your spa can cause the water to become cloudy and dull.  It may also cause your spa to be more likely to have corrosion, staining and/or scaling. Routine cleaning and proper sanitization can help prevent these problems.

Regardless of whether you use a chlorine or bromine based sanitizer, the following basic routine cleaning tips are recommended:

  • Maintain FAC in the range of 3 - 5 ppm.
  • Shower before entering spa.
  • Shock treat spa weekly.
  • Maintain TA in the range of 60 - 120 ppm.
  • Maintain pH in the range of 7.2 - 7.6 (chlorine) or 7.2 - 7.8 (bromine).
Covering and Closing Your Spa

Covering Your Spa

If you are covering your spa for an extended period of time, follow these tips:

If you use chlorine

If you use bromine

Add correct dosage of hth Spa™ Chlorinator Sanitizer while the filter is running. Do this twice a week or as needed to maintain FAC in the range of 3-5 ppm. Blow the water out of the piping, skimmer, filter and heater. Add correct dosage of hth Spa™ Brominating Tablets while the filter is running. Do this twice a week or as needed to maintain the bromine residual in the range of 2-4 ppm.                                                
Ensure the pH, total alkalinity and total hardness levels are maintained in their proper ranges.


Closing Your Spa

If you are closing your spa, please refer to your spa manufacturer’s recommendations. However, if you no longer have this documentation available follow these steps for both chlorine and bromine:

  • Drain the spa of water.
  • Blow the water out of the piping, skimmer, filter and heater. If excess water is not removed from the pipes, freezing could occur, potentially causing your pipes to burst.
  • Remove any remaining water that may be in the foot well or filter area.
  • Remove all drain plugs, including ones that may be on your heater and replace the cover.
  • Make sure your spa is unplugged and your heater is off.
hth spa™ Brominating Tablets
HTH Spa brominating tablets