I have recently been combatting a surge in my TA levels that brings up an interesting question. (or series of them, maybe...) For the first half of the season I had everything in balance and then my pool suddenly developed a leak. While dealing with that I had to add new water several times and I noticed that my TA levels jumped approximately 40 points when replacing 6 inches of water. Since it had been stable prior to that it seemed logical that my tap water caused this so I checked it and got a reading of 375. I haven't bothered to figure out whether that is high enough to cause the jump I noticed, but it seems probable anyway.
Fortunately I have a cartridge filter so I don't have to backwash.... it takes a lot of P.o.P. to work the pH up and then knock it down again from just one 40 point jump! My question though, what does "normal" tap water show for a TA level and if mine is abnormally high, what side effects would that have towards long term plumbing and drinking concerns?
I know that is not really a pool question, but people here know more about this stuff than anywhere else!
Oh, also, my tap water has a CH level of 200 which explains the corresponding high levels in the pool...