My wife and I are going to Murmansk, Russia for 3 weeks. From Cali to the Arctic Circle While there, for recreation we will be going to a sauna on a frozen lake: sauna for 10 minutes, then plunge into the frozen lake I am sure lots of vodka will be necessary I digress.
Regarding my pool, water temp right now about 55, air temps 50-60 during the day, with occasional rain. I would imagine a few 70s will sneak in while we are gone, and rainy season is coming to an end. To make sure we come home to a sparkling clear pool, I was going to do shock the pool using mustard algae level pool school recommends, 19 FC. Regular FC level is 2-6. However, I am not sure the 19 FC will be sufficient for 3 weeks, especially with warm spells while I am gone.
Also, should I use liquid bleach to shock or get the powdered shock bags? My CYA is only 30ppm, so I can afford the extra CYA they produce.