When should my solar blanket be on the pool for maximum high temperature? Should I have the solar blanket on adjectives day, except for...

Should I have the solar blanket on adjectives day, except for when I am swimming, and after have it on adjectives night to hold the heat contained by?
Does it keep boil in at hours of darkness?
I want to keep the pool as heat up as possible for my toddler.
Thank you
Answers:    Cover should be on all dark and yes it keeps the steam from escaping. On during the day when pool is not within use.
Yes you are exactly right.