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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.
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.