Why is it that when I test FC in my pool water I get different numbers depending on where I take the sample?
When testing from my filter return pipe located in the shallow end I get 5.5ppm FC and when testing 18" from the surface at the deep end I get 6.5ppm FC.
I am using a suction side pool sweep which is pulling 80% (estimate only) from the bottom of the pool and remainder from the skimmer box where my pool sweep hose is connected. I am using a Pentair adjustment valve to keep the sweep from climbing to the surface and breaking suction.
So why the difference? Any deep ideas?
When testing from my filter return pipe located in the shallow end I get 5.5ppm FC and when testing 18" from the surface at the deep end I get 6.5ppm FC.
I am using a suction side pool sweep which is pulling 80% (estimate only) from the bottom of the pool and remainder from the skimmer box where my pool sweep hose is connected. I am using a Pentair adjustment valve to keep the sweep from climbing to the surface and breaking suction.
So why the difference? Any deep ideas?