Calcium Hypochlorite Granular Pool Chlorine | Its Uses and Functions 

Calcium hypochlorite and swimming pool care.  Use it for a pool shock or weekly chlorination. 

Calcium hypochlorite and swimming pool care. Use it for a pool shock or weekly chlorination.

Do you want a rough-and-ready type of pool chlorine?  Enough to tackle virtually any job you throw at it?  A chlorine that's been around the block a time or two?  Then calcium hypochlorite might just be the one for you.  It's tough and ready to go when you are. 

Cal hypo (as it's sometimes called) is a chemical compound that is used for water treatment and as a bleaching agent.  It's relatively stable and has greater available pool chlorine level than sodium hypochlorite (liquid bleach).  When kept in dry dark area, it maintains its potency for a very long time.  Commercial grades of Ca(OCl)2 can contain about 70% available chlorine which makes it a good choice for both drinking water and wastewater.

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3 Reasons Why Your Pool's Calcium Hardness Is Increasing

Advantages of Calcium Hypochlorite

Some benefits of using swimming pool chlorine granules are:

  • The level of actual pool chlorine is higher, about 65%-68%
  • It’s lighter and easier to handle
  • Easy to store
  • Easy to apply
  • Can be found at many discount pool chemicals or wholesale pool chemicals stores
  • Great chlorine for your opening pool time and swimming pool closing
  • Safe for your salt water pool systems and salt water pool maintenance. Be sure to turn off your salt cells when doing a swimming pool shock or combating green pool water.
  • Helps reduce your pool maintenance cost and general swimming pool care and maintenance
  • Long lasting when your pool stabilizer is right
  • Excellent for killing algae
  • Helps keep your pool water balanced 
  • Safer to apply
  • Excellent for super chlorination
  • Can be used with chlorine tablets
  • Great for small swimming pools and kiddie pools

Negatives Of Calcium Hypochlorite

  • Calcium Hypochlorite can contain about 30% or more in calcium. Places that may have harder fill water like Arizona, California, Nevada, etc... may want to use liquid chlorine or straight bleach to chlorinate their pools.
  • It may also cause a cloudy pool water problem.  Don't worry about this as it will clear up with proper filtration.
  • Calcium Hypochlorite has a high pH level.  If your fill water has an already high pH level you may want to consider liquid swimming pool chlorine. Using chlorine granules may increase your pool's pH level.
  • After you do a pool shock, your pH level will increase, so keep a bottle of muriatic acid handy to get your swimming pool pH level down.
  • May cause a flare-up of asthmatic bronchitis if not use properly.
  • After a good pool shock you'll need to vacuum the bottom of the swimming pool.
  • Produces strong, sometimes dangerous hypochlorous acid.
  • Because of its caustic nature, calcium hypochlorite would be considered a hazardous material spill.
  • You must know and understand the dangers of chlorine.

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Calcium hypochlorite and swimming pool care. Use it for a pool shock or weekly chlorination.

Always take the proper precaution in dealing with swimming pool chlorine, and for that matter, any kind of swimming pool chemical.  Remember to read the manufacture’s labels and use heavy duty rubber gloves and goggles and keep pool chlorine out of reach of children and pets.  Learn the best way to balance and test your swimming pool chlorine.  Calcium Hypochlorite has enjoyed many years of service to many swimming pool owners.  If it's right for you and your pool, why not try it out?

Happy Swimming!!

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The calcium hydochlorite will not dissolve in our pool 
The calcium hydochlorite will not dissolve in our pool. It is suspended in the water and clings to the tile line in our gunite pool. Ph is at 7.5 …

Liquid or Granular Chlorine System Not rated yet
I'm looking at an automatic pool sensitization system from Jandy. Not sure If I should get the liquide chlorine or the granulare systems. It seems easier …

Backyard Swimming Pool Sand Filter Not rated yet
It has looked like I have sand in the bottom of my pool. The pool shop people have been around to check the laterals and they are fine (they removed the …

There's Too Much Calcium In My Pool And The Water Is Cloudy Not rated yet
We used chlorine with a lot of calcium in it. Now it's cloudy and I don't know how to get it clear. Please give me some suggestions on what to do …