as long as you have not had a bunch of rain and the soil is saturated. if it is you will have a pool that is not in the ground becasue the weight of the water is holding the pool in place. Yes it is safe.
no
Buy some RV antifreeze (the kind that is safe for pets) and pour enough into the drain to ensure the piping is full back to the main body of water. You may have to mix the antifreeze 50-50 with water.
I guess so. If you wash it, I don't see why not?
no it is not
I don't see why not. However, most plants cannot tolerate high levels of salt, so you may wind up killing your lawn or other local vegetation. Additional answer: yes, it is safe to drain a salt water pool into the ground. Refer to posts on draining a pool in general before you attempt this. The concentration of salt in a salt water pool is slightly saline, at about 2700-3400ppm as opposed to the ocean which is at 35000ppm. Certain plants/animals can obviously tolerate salt water better than others, so you may have some issues, but in general the levels should be low enough not to cause too many problems./
Water guns are a safe idea for you child. Floaties and pool balls are other toys that will be good for your child.
The safety of a person swimming in foamy pool water is related to the reason the water is foamy. Chemicals in the pool may not be safe when treating for a time period after added to the water. It is best to ask a person who manages the pool, identify why foam is present, and read all chemical warnings.
I would say water is safe, balanced and crystal clear.
If the water is properly cleaned and treated before swimming, it can be safe to use rain run-off in a pool.
I would think that a partial drain of the water would be best here mainly because of the liner age and shrinkage. If the liner pops out during or after draining you are most likely going to have to replace the liner.
If you are talking about a roof water drain pipe to sewer it is illegal. If you are talking about a sink drain pipe well that is where they all connect to so yea.