This is my first closing for a pool we got last July. I know I don't have to literally close the pool for the winter, due to our So. Cal location, but the thing is we are leaving for a 4 week vacation, and I'm thinking the best thing to do is keep it covered. This time of year it gets windy, and the afterward the pool will have lots of dirt and leaves. I also don't want to take a chance that, if it happens to rain a lot, the pool will overflow. We'll have a housesitter, but I don't want to burden her with having to deal with the pool.
So, my plan is to cover the pool, and have the housesitter just add chlorine once or twice a week through the skimmer. The filter will run on the usual schedule. When I get back I will decide if I want to leave it covered for the rest of the winter, or open it up again. Does that sound like a good idea?
Also, a few questions:
1) Is it safe to add the chorine through the skimmer? I've read conflicting opinions.
2) Should I shock the pool before covering? Or just keep the levels normal?
3) Is there a drawback to having the chlorine levels too high? And how high would be too high?
Any advice will be appreciated!