OK so I thought I had this pool thing down but now I am perplexed....
See below parameters.
Water test on June 13th (at pool store)
FC 3 TC 3.31 ph 8 CH 238 Alk 63 CYA 60 Copper 0.1 Iron 0.1 THese numbers have been pretty consistent with all the water tests I've done
Pretty good over all. Been adding Muriatic Acid regularly, adjusting SWG.
Only thing that seemed a little low was CH- I used pool calculator and to get up to around 300 (goal 250-350) said to add 19 pounds of CH
I only added 5.
So, I test my water today (at a different pool store)
FC 1.61 TC 1.61 ph 8.4 CH 417 Alk 73 CYA 63 Copper 2.9 Iron 1.6
Wait, WHAT!!!?? CH 417 Copper 2.9 Iron 1.6
I know what you're thinking- pool store made a mistake, scam, etc. THat was my first thought.
Problem is, I tested it against the home test - all the things that I can test - they are right
PH, chlorine, CH, CYA- all spot on . SO can they be right about the copper too???
SO now I 'm heading to a different store to check copper...
THe only things that were done between these 2 readings were 5 pounds of CH , and we had heavy rains.