SeaKlear Spa Sanitizing Granules

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Clean your spa or hot tub, and keep it clean, with SeaKlear® Spa Sanitizing Granules! Using this product is the best way to sanitize chlorine-based spas and hot tubs, keeping them clear, clean and healthy. For best performance, each granule contains 99% chlorine.

SeaKlear Spa Sanitizing Granules are a highly effective way to sanitize your chlorine spa, keeping it clean, clear, and healthy. Sanitizing is an essential step in caring for any spa as sanitizers destroy germs and disinfect the water. Its quick-dissolving granules can be added directly to your spa water without any messy pre-dissolving or mixing needed. Each granule is made of 99% pure chlorine for superior performance. Best of all, Spa Sanitizing Granules are made to the exacting standards SeaKlear demands of all its products, allowing you to buy with confidence.

How To Use:

  • Turn on the circulation system and ensure that it is operating properly.
  • Over the surface of the water, scatter approximately 3 teaspoons of SeaKlear Spa-Sanitizing Granules per 500 gallons of water. Always use a clean, dry, plastic scoop.
  • Maintain 3 ppm free available chlorine (FAC) while the spa is in use. Test for FAC with a test strip and add additional product if needed.
  • Add SeaKlear Spa-Sanitizing Granules after each use or as needed to maintain a 3 ppm level of FAC.
More Information
SKU 1140005
Manufacturer SeaKlear Spa Chemicals
UPC Number 662817905918
Product Weight 2 lbs or 908 g
Shipping Weight 2.15 lbs

Active Ingredient: Sodium Dichloro-s-triazinetrione Dihydrate - 99%

Other Ingredients: 1%

Total; 100%

*Available Chlorine: 55.5%

Method of Application: Broadcast the product evenly over a wide area in the deepest part of the spa with water circulating.

Spa and Hot Tub Use: Each level teaspoon (0.17 ounces) of this product will provide approximately 1.4 ppm available chlorine in 500 gallons of water.  Using an appropriate test kit, test and adjust the water to the following values: pH 7.2 – 7.8, total alkalinity 60-100 ppm, calcium hardness 200 ppm minimum.  Maintain these conditions for proper spa and hot tub operation by frequent testing with a test kit.  Do not allow cyanuric acid level to exceed 150 ppm.  It is recommended that spas and hot tubs be drained every 30 – 90 days.  More often under heavy use.  Consult manufacturer’s recommendations concerning the compatibility of chlorine sanitizers with their equipment.  Some oils, lotions, fragrances and cleaners may cause foaming or cloudy water and may react with chlorine sanitizers to reduce their efficacy.


Start-Up (Freshly Filled):

  1. Turn on the circulation system and ensure that it is operating properly.
  2. Add 6 teaspoons of this product for each 500 gallons of water.

Check the free available chlorine (FAC) and, if below 4-5 ppm, repeat as needed.  Re-entry into treated spas is prohibited above levels of 3 ppm of chlorine.


Regular Use: Turn on the circulation system and ensure that it is operating properly.  Scatter approximately 3 teaspoons per 500 gallons of this product over the surface of water.  Always use clean dry spoon.  Test for free available chlorine (FAC) and add additional product, if necessary, to attain 4-5 ppm FAC.  Maintain 1-3 ppm FAC while the spa or hot tub is in use.  After each use, shock treat with 9 teaspoons per 500 gallons of water to control odors and algae.  Repeat as needed.  Re-entry into treated spas is prohibited above levels of 3 ppm of chlorine.

Shipping & Delivery

Chemical orders typically ship within 1 business day via UPS.

Returns & Replacement Policies

Chemicals must be returned unused within 30 Days of purchase date. At time of receipt of returned parts, you will receive a refund less the shipping cost.

If you are unsure whether the chemicals you are ordering is correct, please contact us at 844-853-4235 to confirm you are ordering the correct products for your hot tub.

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I was chasing chemicals using Bromine as a sanitizer. Now that I've found the SeaKlear products, I no longer have those issues.
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