I opened pool about 3 weeks ago and all looks great. I started using the 3" chlorine tablets and weekly granular shock ever sunday evening. The problem I am experiencing is when i shock on Sundays the following day I have residual laying on bottom of pool. The chlorine level is where they should be the cya is high 104. Any idea why I am having this fall out? My pool supplier says it is the calcium falling out and not dissolving. What do I do it is messy looking after shocking.
Thanks for any help you can offer. Becky