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  Kathie February 3, 2009 at 5:22pm

  Can you confirm that your team isn't prediluting the acid? (If you don't predilute the muriatic acid before you add, it reduces the TA significantly.) Seen it many many times - "normal" if you don't predilute before adding it as adding straight muriatic is the way to reduce TA. That's a way to monitor service personell as predilution takes more time, yet adding muriatic costs longer term moreso to increase back the TA on the next trip.
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  Karen Maddox February 3, 2009 at 8:35am

  Thank you to you both!!
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  Joe Dethloff January 29, 2009 at 8:24pm

  I agree with Ken - The muratic acid that you add will play a role in reducing the total alkalinity. ESPECIALLY if a large concentration of muratic acid is added at one time. You can actually come close to "zeroing out" the TA if you add too much. Personally, I don't think that 20-40 PPM reduction in a 4 month time span is really that much... I would expect to add alkalinity...
  
  Again - I would emphasize that you need to test first the source water. Here in Jacksonville, FL I see about a 20-40 ppm reduction in a 3 to 4 month period... I always test for TA first... adjust it to parameters then go from there... being careful to keep a reign on pH as excessive pH= excessive acid demand. Excessive acid demand = reduction in TA.
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  Kirk Gilmore January 29, 2009 at 8:57am

  It depends on if/how much Muriatic acid your adding to the water. Are you using Trichlor. because that lowers PH. What does your source water test out at.