Smart Steps - Pool Chlorinating

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(00:01) Step 3 - Chlorination
(00:13) Chlorine
(00:27) Too Little Chlorine
(00:32) Too Much Chlorine
(00:41) Free Chlorine
(00:50) Combined Chlorine
(01:05) Total Chlorine
(01:49) Granular Chlorine
(02:03) Tablet Chlorine
(02:18) Liquid Chlorine
(02:31) Shock Chlorine
(02:44) Visit Your Nearest Bunnings Store

Chlorination, also known as sanitisation, is the 3rd step in the Hy-Clor Smart steps process.

Chlorine levels should ideally only be adjusted once the balancer chemicals, such as pH, Alkalinity and calcium, are balanced.
Chlorine is the superstar of pool sanitisers, as it kills bacteria, algae, microorganisms, and viruses to keep your water looking pristine and safe for swimming.


Maintaining the right balance of chlorine in the pool is crucial. Too little chlorine can lead to algae growth and inadequate sanitation, while too much can result in strong chemical odours, skin and eye irritation. Your chlorine level should stay between 1-3 parts per million.

There are 3 common chlorine terms which are useful to know.

Free chlorine - this chlorine is free and available to work in order to sanitise your pool.

Combined chlorine - When free chlorine starts doing it’s work, it oxidises pool contaminants and becomes combined chlorine. During this process, free chlorine is used up. chloramines are formed during this process and chloramines are what create the distinctive chlorine smell.

Total chlorine - Total chlorine is the sum of free chlorine and combined chlorine.

If your free chlorine level is the same as your total chlorine, none of your chlorine has been used up yet. If however, your total chlorine is much higher than your free chlorine, your most likely to have a buildup of chloramines. To correct this, shock your pool water through a super chlorination process. Theoretically you need to increase free chlorine by 10 times the combined chlorine level to hit the chlorination breakpoint.

In practice, we recommend using Hy-Clor SuperShock at 4 x your daily dosage or you can also use liquid chlorine at 10 x your daily dosage.

There are 4 categories of chlorine:
GRANULAR, TABLETS, LIQUID AND SHOCK.

Granular chlorine is versatile and strong. It is either unstabilised or stabilised. If stabilised, it contains an additive to protect from UV. Granular chlorine is required to be mixed in a bucket of water prior to putting it in the pool.

Tablet Chlorine - Tablets are a convenient way to maintain chlorine levels.
Placed in a floating dispenser, they dissolve slowly. Fewer applications are needed compared to granular. Multi Tablets for example also contain a copper algaecide.


Liquid Chlorine - Due to its liquid state, liquid chlorine is fast acting and easier to use as it does not require mixing in a bucket of water like granular chlorine does. It is however less strong than granular.


Shock - Used whenever combined chlorine levels are high, and useful to do from time to time. It breaks down chloramines which reduces the chlorine smell and makes water easier on eyes and skin.


Which chlorine is best for your pool? Check out the chlorine selection chart on the Hy-Clor website or head into a Bunnings store near you.


With Hy-Clor's 5 Smart Steps, pool care is a breeze.

Hy-Clor - Easy Affordable pool Care.

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