Liquid Chlorine vs Chlorine Granules: What’s the Difference?

Last Updated: April 19, 2021

When you first realized to care in your pool, you in all probability have been taught by a buddy, member of the family, or skilled. They possible launched you to both liquid or granular chlorine, and also you caught with their advice. Through the years, have you ever ever puzzled which is healthier? Does one choice work higher in your pool and your particular person wants, or are all chlorines created equal?

Here is a fast and straightforward rundown on the variations between liquid and granular chlorine and which can work best for you.

Liquid Chlorine

Liquid chlorine is a really highly effective option to clear your pool water and preserve it protected for swimming for the whole summer season. The pH stage of liquid chlorine is true round 13, which is sort of excessive. When including one thing with an especially excessive pH stage, you’ll possible have to steadiness this out by including acid to the water.

Liquid chlorine is mostly utilized in industrial swimming pools. The reasoning behind that is that it’s obtainable in massive 55-gallon drums that may be poured immediately into these massive swimming pools.

When communities and resorts want a less expensive and fast-acting resolution, liquid chlorine is advantageous.

Although it is suggested to make use of a peristaltic pump when delivering liquid chlorine, it’s typically acceptable to pour the chlorine immediately in. Another issue to contemplate with liquid chlorine is that it’s extremely corrosive on this kind, and it may trigger some points long run, particularly in smaller swimming pools.

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All types of chlorine comprise cyanuric acid. However, the ranges of cyanuric acid that liquid chlorine leaves behind could be fairly a bit larger. Cyanuric acid can depart pool water cloudy and make chlorine total much less efficient. If you’re utilizing liquid chlorine make sure you take a look at your cyanuric acid ranges sometimes.

Granular Chlorine

In The Swim Sodium Di-Chlor Chlorine Granular Pool…
  • In the Swim’s granular chlorine is good to be used in swimming swimming pools, spas, fountains and water…
  • Powerful sanitizing powder that destroys micro organism, breaks down contaminants and kills algae
  • Calcium-Free formulation retains hard-water swimming pools glowing clear and crystal clear

Granular chlorine comes with a pH of seven, making the pH/acid steadiness far more comfy for a house owner to cope with than the pH of 13 that the liquid chlorine has. Granular chlorine is available in three differing kinds.


Leisure Time 22337A Spa 56 Chlorinating Granules…
  • BENEFITS: Destroys natural contaminants to keep up clear, clear, sanitized water; helps management…
  • USE: Specifically formulated for spa and sizzling tubs; can be utilized as a shock remedy
  • COMPATIBILITY: Chlorine sanitizing techniques

This type of granular chlorine has a pH of seven. It is very efficient and the most costly of three varieties of granular chlorine (that are all extra expensive than the liquid). Di-Chlor does a superb job of stabilizing the chlorine ranges, and though it prices extra, most pool house owners discover themselves utilizing much less of this than different various chlorine varieties.

Di-Chlor comprises about 62 p.c chlorine per pound. Some pool house owners use Di-Chlor as an alternative choice to shock.

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Lithium Hypochlorite

This type of granular chlorine has a pH of 11. Lithium hypochlorite solely has about 35 p.c chlorine per pound, so you will want a big quantity of it to maintain your pool chlorine ranges the place they have to be. It is inexpensive than the Di-Chlor, and it dissolves in a short time, virtually like the liquid chlorine.

The lithium hypochlorite is mild sufficient that should you had a pool day with numerous swimmers and really feel the pool wants a slight enhance, you’ll be able to sprinkle some in. For vinyl swimming pools, lithium hypocholite can assist to maintain the liner trying good and never bleaching it out.

Calcium Hypochlorite

The hottest kind of granular chlorine obtainable. Calcium hypochlorite is hottest amongst residential householders with swimming pools as a result of it may be each sensible and reasonably priced. The pH on that is 12, and it has about 65 p.c chlorine per pound.

Indeed, this looks like it’s the most suitable choice of all people who we’ve got mentioned. Calcium hypochlorite can be the hands-down winner for the best total choice besides that it may be a bit harmful.

It may be very generally used as a shock for swimming pools, and it’s unstable. The undeniable fact that it’s unstable makes it very straightforward to get the chlorine in your pool too excessive. Calcium hypochlorite will possible be the least costly choice you discover, however make sure you examine chlorine ranges typically and be further cautious when dealing with this product.

Swimming pool

Image credit score: Swimming pool by AgEGlobalGroup, Pixabay

How Do I Know Which Chlorine Option Is Best for My Pool?

The excellent news right here is you could’t make a improper alternative. All the chlorine types we talked about will successfully clear your pool and preserve it protected for swimming. The most important causes individuals select one choice over one other are the kind of pool and worth.

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For massive industrial swimming swimming pools, liquid chlorine goes to make the most sense. It will get the job carried out the quickest and most cost-effective.

For residential pool house owners, the pill or granular kind is less complicated to work with and can possible trigger much less observe up points concerning acid and pH ranges in your pool. Take cautious consideration when deciding which kind of chlorine to make use of that you’re recurrently checking the swimming pools chlorine and pH ranges.


If your pool has been clear, your pH and alkalinity ranges on level and your chlorine all the time inside vary, we don’t advocate making any modifications to the kind of chlorine you’re utilizing.

However, in case you are coping with points like chlorine being too excessive or vinyl liners bleaching out, it might be time to check out what you’re utilizing and reevaluate its effectiveness.

The most important issue to repeatedly remember when coping with chlorine is security. These chemicals are crucial to assist us take pleasure in a summer season of swimming, however they’re additionally extremely harmful when not dealt with correctly. Best of luck getting that pool glowing!

Featured picture credit score: Luxury pool by GregoryButler, Pixabay

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