Hurricane Sandy threw my schedule off. Living in the Northeast, I typically start closing my pool the first week in October; it's usually 2 days to 2 weeks. However, mild temps made for good swimming through the first two weeks of October, delaying my schedule. Even when Sandy hit on Oct. 29th, it wasn't too cold (55-60F during the day). But a week without power, then trees down across my pool, made for a tricky and lengthy clean-up. It was only the day before Thanksgiving that I was able to completely remove the tree limbs, and fish out the 400+ gallons of leaves out of my pool. I kept adding slow tabs to the Chlorinator, removing the debris from the baskets, and gave the pool a good vaccumming - my pre-closing routine.
But as I couldn't start & complete the closing over the holiday weekend, I am now worried as it's scheduled to snow here on Tuesday (11/27). Here's what I wonder: do the coligative properties of Chlorine molecules in solution with water drop the freezing point of the water? Or put another way, what's the freezing point of a 30,000 gallon pool with 3-4ppm of total Chlorine in solution? Do I have another 2 days to get this done?
What I need is 1-2 more days to close the pool and get the cover on; after the snow, the temp is back up to 50-55F for the next 2 days. My usual closing routine is:
1. clean the pool
2. over-chlorinate (5-6ppm)
3. add a quart of winter algacide
4. lower the water level to below the skimmers
5. remove the nozzles & baskets
6. blow water out of lines with a shop vac; add anti-freeze, install gizmos
7. drain filter, remove multiport (inside)
8. disassemble filter PVC pipes, chlorinator
9. take pump motor inside
10. remove banister, diving board
11. put loop-lock cover in place
Any suggestions / help appreciated!