No as long as it is a small amount
No
their is no air in the water
You should remove the antifreeze with a shop vac if possible, antifreeze will not hurt the water, but is just one more thing in the water that you do not need to be there.
It is for your own safety. If the lightning strikes the water, it will hurt you.
water pressure
When we had a baby pool, we carefully lifted the side of the pool and dumped it into the yard. If the side was too heavy to lift enough to begin draining, we could use a bucket to remove some of the water weight first.
The reason bellyflopping hurts is that the water doesn't get out of the way fast enough when you hit it. Realizing that jello would get out m the way even slower than water does (it's a lot more viscous) it would hurt more to bellyflow into a pool of jello
It shouldn't after all the top of the pebble tech pool is out of the water forever and it doesn't seem to hurt it. However be careful that you don't get a build up of ground water around the outside of the pool, This can cause an empty pool to start floating and that will definitely hurt it. If you have a hydro static valve at the bottom that works it should be ok.
Yes. It could kill them.
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.
They look like baby tadpoles, they are small black and have a tail. They wriggle around like small worms in the pool water.
NO! The chemicals in the pool will hurt them, not to mention it's MUCH too cold! Let them swim in a shallow bath tub filled with warm (not hot) water.