Sure but it is not the same strength as pool chlorine. It can also contain metals that can stain you pool surface.
There does not appear to be anything that can be put in your pool to redeye your concrete in the pool dark blue. This can only be achieved by draining the pool and painting the concrete a dark blue color.
Give it a couple days, it will dissipate.
put bleach on your driveway
Depends on the what kind of plastic, some cause a chemical reaction when put together with bleach.
It will not hurt as long as it is on the hair. You should not touch the scalp or your hands with it as it will burn and you should never use household bleach because your hair will dissolve in it.
2gallons per 10k of water
None. That is extremely unhealthy to your child.
Not if you let the kids into it. Better to drain it, use bleach to clean and kill the algi, and then rinse well.
Yes but you also need chlorine stabilizer (CYA) or the chlorine will be destroyed by sunlight in a very short time or you need to add the bleach in doses thoughout the day to maintain the chlorine level. Bleach is the same as liquid pool chlorine but at a lower concentration.
If you put in a gallon or less per 10,000 gallons of water don't worry about it; but wait 4 hours after running filter before entering. Bleach is chlorine which helps the pool rid bacteria, although chlorine powder or tablets is preferable.
how much chlorine do I put for a 1,718 gallon pool
Not hurt the pool but it can inhibit chlorine from sanitizing properly in high amounts. If its to high just drain some water out and refill with fresh.