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Blue Sparkle™ Skimmer Tabs, 17.7 lbs.

Your pool stays clean and clear with hth® sanitizer products, designed to effectively guard against bacteria, algae and other organisms.  We offer two types of chlorine-based sanitizers: stabilized and unstabilized.

The hth® Benefit: Overstabilization is caused by excessive cyanuric acid (CYA) levels in pool water, which render the chlorine ineffective.  hth® Blue Sparkle™ Skimmer Tabs are non-stabilized (contains no CYA), so there is no chance of overstabilization. hth® Blue Sparkle™ Skimmer Tabs will work in skimmers only.  Start off by adding 1 tablet per 10,000 gallons of pool water as often as needed to maintain a free available chlorine residual of 1 - 4ppm.   

  • Non-stabilized (contains no CYA), so there is no chance of overstabilization
  • For skimmer use only
  • Slow dissolving yet fast acting

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Maintaining Proper Chlorine Levels

Test Your Water

How often you should test and balance your pool can vary based on how often you use it and a number of other variables, but it’s important to remember that, for chlorine and pH, you should usually test your pool two to three times a week. That may sound like a lot, but water balance is vital for your pool’s health and the health of the people who swim in it. When your pool is out of balance, your sanitizers can be less effective, the water can cause irritation to the skin and eyes, and if the water gets imbalanced enough, it can even damage the pool’s surfaces, structure, or equipment

Shock Weekly

In ideal circumstances, shocking your pool just once a week will keep it looking clean and clear, but any heavy rainfall, signs of algae, use by lots of swimmers, or periods of very sunny weather can deplete free chlorine levels, which means an extra dose of hth® shock is needed. Sundown is optimum time to shock your pool because the chlorine can work without fighting the sun's ultraviolet rays and has more time to restore water clarity.

Overstabilization: What is it?

While small levels of CYA (20 – 40 ppm) do serve a purpose in protecting chlorine from sunlight degradation, too much can cause problems. Over-stabilization (> 90 ppm) is the buildup of cyanuric acid (CYA) in swimming pool water resulting from the use of stabilized sanitizers and stabilized shock products.  It significantly decreases the effectiveness of chlorine in killing germs, bacteria and algae.

hth® Pool Care offers sanitizer and shock products that are non-stabilized.  These are calcium hypochlorite (cal-hypo) products, do not contain stabilizer and will not cause over-stabilization.                     

Symptoms of overstabilization:
Green water
High chlorine reading with algae
Adding chlorine does not get rid of algae

What is the Solution to Overstabilization? If the CYA level is > 90ppm, adjust this by partially draining some water from the pool, refilling with fresh water, balancing the water and switching to hth® non-stabilized sanitizers and shocks.

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