I decided to close the pool this winter - betting that the Raleigh NC area is going to have a colder then normal winter(according to Farmer's Almanac).
After shocking the pool and winterizing the filter and pumps, algae has grown and I've now got a nice green swamp.
I've considered buying a few cases of liquid shock, so I can use the brush to mix in 4-5 gallons each month until we get the pump restarted this spring - hopefully by the end of March.
I'm wondering if it's worth the effort now. I can kill alot of it off, and don't expect the algae will get worse during the cold temperatures, but I won't be able to do any vacuuming to clean it up.