I am struggling with a cloudy pool. I have never run into this and I hope some of you have. I service a 37,000 gallon therapy pool at 91 degrees F. It has cartridge filters at 580 sq in filter area. The water is cloudy and has not improved in 9 days, nor has the filter pressure increased. I have added clarifier, then filter fiber stuff, no change worse or better. I maintain it with bromine and Aqua Finesse for biofilm. The numbers are Bromine-3ppm, pH- 7.3, Alkalinity 100ppm, Calcium is high at 650ppm. I've added scale remover and Pristine Check to remove calcium, still no change. HELP!!! Thank you.

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  • I have many pools on service with a high calcium hardness of  about 700 to 800 ppm (hard water area) and they are not cloudy.  If you happened to have added a phosphate product, that can cause cloudiness.  Also, when adding Fiberclear, watch the return line for any cloudy (milky) water coming out which indicates a problem with the filter.

     

    • Jason

      Great that the pool is crystal clear. Test your fill water source for calcium as well as pH, total alkalinity.

      You will have better understanding of treating if you get familiar with your water source.

      Use the stain and scale sequestering agents as a maintenenance item. It works.

      Keep it simple with your chemical maintenance. Less "junk" in the water makes for better control.

      Because it's a therapy pool and it's pretty warm, clean your cartridges weekly. Having a spare set on hand to switch out during cleanings keeps down time to a minimum.

  • Thanks, I drained and filled. Calcium is 350, it's crystal clear!
  • Jason

    Sounds like your calcium is the problem. Should not exceed 400 ppm. Check your TDS level too. I'm sure that's off the charts.

     

    You will have to drain a good portion of the pool and refill. Nothing removes calcium. Clean your cartridges or toss them if there are gunked up. Stop using the clarifier and the other stuff. It's fouling the cartridges.

    If you can set up a temp DE filter it will grab the finer particles. Jack's Magic works great for controlling scale. 

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