My TA has been slowly creeping up and after putting two and two together realised it was caused by my fill water. I keep my TA at 70 and PH at 7.4 because my CH is off the scale at 640 (and rising) and this morning decided to test the TA out of the garden tap, it was 250.
I tested the kitchen sink tap water and it was 180, hmmm quite a difference. I decided to fill the pool for 2 minutes to get the standing water out of the pipes and tested again, this time 160. So I've found out why my TA is always on the up (PH stays firm at 7.4) and I've also found out not to test the fill water without running it for a few minutes.
Anyone else discovered this about higher TA from standing water in the pipes and is 160/180 good/bad/average for tap/fill water?