To get in the pool on your period you can use any of the following:
Menstrual cups are the best option because unlike tampons they can be worn even when your flow is light and for up to 12 hours without any health risks, also they don't increase cramps, have anything showing outside your body, absorb water, or leak like tampons and other options can.
why not any time.
Only of it light
Yes, to a degree the blood from your period will blend with pool water - like it would when you're in the bath - but of course it may be noticed, and pieces of uterine lining will not blend with pool water. Although menstrual flow is not dirty it's not hygienic or pleasant for other people to have to be swimming in your menstrual flow, so always use menstrual products like cups or tampons in the pool when you're on your period.
You cannot do this, it would be embarrassing for you, so wear a tampon, or stay out of the pool.
If a pool is left empty, it will lift partially out of the ground due to moisture under the pool after a heavy rain.
U can't or maybe try a pool? Why ask that question?
No.
You can. but you should not leave an in ground pool empty for any period of time. Ground water building up around it is capable of even lifting an empty concrete pool out of the ground.
so the athletes can cool of in a freezing cold pool Chlorine on its own is "unstable". That means in about 24 hours, all the chlorine in the pool will outgas into the air, leaving none in the pool. Stabilizer (cyanuric acid) stabilizes the chlorine molecules, which keeps the chlorine in the pool, allowing a longer period of time to do its job of killing bacteria.
NEVER wear tampons when not menstruating - it's not safe and no need.
Because your filter needs cleaning after a period of time.
Nothing... You should just wear a Tampon when you go swimming.