Salt Chlorification

Salt Chlorification

Salt Chlorification

The Process

The salt in the swimming pool water is transformed by the electrolysis cell into chlorine gas, a powerful disinfectant that is instantly diffused into the water. The chlorine solution produced destroys micro-organisms in the cell and maintains a controllable level of free chlorine in the pool.

The active chlorine is constantly regenerated by the cell without any user intervention. Salt chlorination works particularly well along side a UV ( Ultra violet ) system that will remove contaminants such a sun screen and perspiration from bathers.

Water Balance

With the addition of salt to your pool, your pH will be altered. Regular testing and adjustments are very important to allow the chlorine produced to work effectively.

There is chlorine in a salt pool.
Salt water pools are not chemical free pool, or even a chlorine free pool. Salt water is not capable of providing any sanitation for pool water without electrolysis. During electrolysis, salty water is forced across a special metal cell which is charged with an electrical current. This process creates chlorine.


Cyanuric Acid (Stabiliser) has to be added to pools, especially salt chlorinated pools to stop the suns UV destroying the chorine in the pool water. Chlorine stabiliser is essential to prolong the life of chlorine in the pool water. It acts like a sunscreen for your pool water.

Compatible equipment

It is very important that before installing a salt chlorinator that you ensure that all your filtration and heating equipment is suitable. Many circulation pumps, booster pumps and boilers are not compatible with salt. Although they all may last a season, the salt concentration will slowly corrode the units resulting in expensive replacement of parts. Your pool man will be able to advise you.

What Salt?

PDV Vacuum Salt:

It is very fine and dry and dissolves rapidly into the pool water.
You can use most salt otherwise but it may take longer to get into
the pool system.

How much salt?

Using a zodiac salt chlorinator The average 11,000 gallon pool
will initially need 200kg of salt , 8 x 25kg bags. Different models
may vary on the salt requirements.
Pros and Cons


1)Continuous input of chlorine into your water reducing the need to shock dose the pool.
2) So much nicer to swim in. You don’t leave the pool smelling of a pool.
3) Reduces your need for expensive stabilised chlorine
4) No risk of green tint commonly found in blonde haired swimmers


Expensive to buy and install
Salt and metal in any form do not like each other.
Attention to your pH levels becomes more important
You have to be careful when using on an indoor pool. Chlorine gas can be dangerous
Additional electricity costs and stabiliser costs.
Replacement Cells will set you back a lot of money if you are unlucky enough to have one fail.

Related Content