I'm new here; great site! I've already learned a lot. I just replaced my vinyl liner and refilled the pool about 3 weeks ago. Been using BBB. I got a Taylor K-2006 & here's my numbers:
CH 0 (I guess; the sample stays blue/violet, never turns red)
Water temp 86 F
11K gallons, inground, vinyl
Do I need calcium? Other numbers look OK? Thanks a bunch for your help.