
www.delozone.com 1-800-676-1335
Cloudy Water in a Pool
Don’t Worry; In This Case, It’s Good
What Causes Cloudy Water?
Cloudy water can be caused when an ozone generator is rst installed
because the ozone oxidizes the organics in the water causing them to form
a chain which then becomes visible to th eye and gives the water the cloudy
appearance. Another way water can appear cloudy is with an imbalance
in the water. Always check to make sure the pH, alkalinity and calcium
hardness are balanced.
Customers are concerned when, within a day or two of installing their ozone
generator, their pool or spa water becomes cloudy.
The common reaction is to “shock” the water which clears the water for one
or two days before it turns cloudy, and they need to “shock” it again.
Shocking the body of water with large amounts of chlorine will break down
the molecular chains formed by ozone, but is not recommended. Water will
appear clear temporarily, but a few days later the shock is exhausted and
the ozone cycle begins again, resulting in cloudy conditions.
To avoid this cycle, the chains formed by the ozone must be allowed to grow
large enough to be ltered.
Steps to Clear Cloudy Water:
• Balance any imbalance in the pH, alkalinity or calcium hardness.
• Remove and clean lter or backwash lter.
• Operate circulation system or pool pump for the minimum recommended time. It
may be necessary to increase ltration time.
• Make sure the ozone generator is working properly for the entire ltration cycle.
• Let the water remain cloudy for an extended period to allow the chains to become
large enough to be caught in the lter.
• SPAS: Put a handful of cellulose ber (such as Puraber) into the lter, through
the skimmer, to reduce the pore size of the lter media. Wash the lter after
overnight operation.
• POOLS: If using a sand lter, put a few handfuls of cellulose ber or alum into
the lter, through the skimmer, to reduce the pore size of the lter media. After
24 hours, backwash the lter.
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