Re: Should I use AutoClear SWG - or not?

Originally Posted by
haeffnkr
OK - will wait to here from the experts.
My CYA is 25 now and my CAL is 200.
Is my CAL too high for a fiberglass pool?
Any more suggestions would be appreciated.
thanks for the help.
Kevin
CAL is fine...not really needed in a fiberglass pool unless you have grouted tile work or a heater. I keep mine at 200 to 250 ppm for these 2 reasons.
Most SWG manufacturers recommend 60 to 80 ppm CYA and I keep mine there. The explanation from the Tech department at Goldline Controls was it's because the way the chlorine is introduced at very high concentrations in the cell and 'supershocking' the water in the cell whenever it is generating.
BTW, my pool is white and I have no scaling. Where do you keep your TA and do you monitor your pH and add acid regularly to keep it down. SWGs cause a constant upward shift in pH and high pH can lead to scaling! Test strips just don't have the accuracy to depend on! The pH test is really bad because most of the strips jump from 7.2 to 7.8 and that is just too big a range to really know where you pH is.
IF citric acid removed the stains then they were caused by metal. Fiberglass pools are prone to staining by mangenese, iron and copper. Don't know if citric acid works on calcium scale but muriatic does. You might want to use a sequestering agent on a regular basis to help prevent this.
Last edited by waterbear; 06-01-2006 at 09:19 PM.
Retired pool store and commercial pool maintenance guy.
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