It is only safe to swim in a pool when a dead rat is found if it has been drained and sanitized. You risk dying if you enter before the pool has been 100 percent sanitized.
Read the label, but usually it is safe. Pool Masters
Shock your pool at sundown and you can swim in it the next morning.
no you would have to do something about it
It is not recommended to swim in water that is being treated with most algaecides.
no it is not because you can get some in your foot.
No they will nibble your toes it will tickle and you will drown from laughing underwater.
yes.. it has a low pH ... acid rain... so you need to add pH plus.
I would chlorinate the pool and run filter for several hours, and you will be fine
This is your choice and depends especially to your resistance to cold water.
you should have your pool tested just to be on the safe side.