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Use of Algaecides
Although not normally needed, algaecides may be used in conjunction with a Clearwater chlorinator.
Consult a pool professional regarding the presence of phosphates in your local area and always follow
manufacturers instructions for treatment.
The chlorine residual level maintained by a Clearwater chlorinator is the best defense against algae and
is usually all that is necessary. If algae is observed however, brush spot thoroughly, adjust pH, and super-
chlorinate with the Clearwater chlorinator or manually shock the pool water with either liquid or granular
chlorine. With extreme algae conditions, manually shocking the pool is the best option. A chlorine
residual should be measurable within 24 hours. If not, repeat shock treatment. After shocking, make sure
the Clearwater chlorinator is maintaining a residual chlorine level to prevent future algae growth.
Note: Overuse of algaecides can lead to a reduction in chlorine residual because algaecides can
negatively react with the chlorine produced by the Clearwater chlorinator. When using algaecides, always
follow manufacturer's instructions and adjust the output of the Clearwater chlorinator to maintain the
proper residual chlorine level.
The addition of certain chemicals can reduce the effectiveness of chlorine. Always make sure
that proper residual chlorine levels are maintained to avoid illness.
Use of Sequestering Agents
In some areas the calcium hardness of the source water may be unusually high. High calcium hardness
contributes to scale formation in the pool. Sequestering agents may help to prevent this by keeping
minerals in solution. Consult a local pool professional about the use of a sequestering agent.
Use of Phosphate Removers
High phosphate levels in the pool water can reduce the amount of chlorine in the pool. Consult a pool
professional for phosphate testing and removal.
Adding Salt to the Pool
Salt is lost when water is splashed out of the pool and during backwash, not through evaporation.
Adding fresh water to the pool and rainfall can also dilute the salt concentration. To maintain an optimum
concentration, salt may need to be added from time to time. Always test the salt level before adding salt.
Test the salt level at start-up or whenever the CHECK SALT light comes on. The light may switch
on if the salt level is low, the water temperature is below 65° or if the cell is badly scaled.
The salt concentration should normally be around 4000 ppm. Never allow it to fall below 3000 ppm, as
this can reduce the life of the cell electrodes.
IMPORTANT: To avoid damage to your Clearwater chlorinator, never allow salt level to exceed
13,000 ppm. Other components of your pool equipment may be damaged if the salt level is kept
above 6000 ppm. Refer to the manufacturer’s operation manual for warranty exclusions.
To determine the salt level in the pool water.
• Capture water from elbow depth in a container.
• Use a salt test strip or test meter to test the sample, or have it tested by a pool professional.
