It's the start of the season here in Australia and i did the full set of tests in order to balance the pool for the coming months. Not looking too bad, except the CH levels. My levels tested at 290 (with the TF100) which, when i Last looked at pool math, was in the goal 250-350 range but when I looked today I saw the the goal range is now 350-450. Pool school still refers to the 250-350 range so I don't know whether pool math has a typo or you guys have changed the goal? If so why? No worries to add a couple of Kilos of Hardness Increaser if necessary.
I'm also wondering if I should bump up TA? it always seems to come down over time and settles to around 50.
For reference the full set is :