No you can reuse the water as much as you want for 24 hours.
Yes you can use it for a whole day change the water out daily but that water I either pour it down the toilet (helps keep it clean) I soak white things in it, anything dirty or I pour it into a spray bottle to clean with because I find putting it down a sink a waste 😂 so I try to find ways to reuse that very diluted bleach lol.
Yea you can!
you can keep adding during those 24h :)