no. Rock salt is normally used as a saltlick for animals.
yes
If tree roots are in your septic system, you really need to seek professional help. Rock salt will kill tree roots but they will still need to be removed.
Yes.
Rock salt will definitely repel any frog. This is because the rock salt will threaten to draw all of the moisture out of a frog's skin and kill it.
No, Marshmallows will not kill mice.
mice
Some kinds of rock salt can kill an animal or make it ill if it is swallowed. Other rock salts (mostly the more expensive kinds) will not harm animals. Very few rock salts are friendly, if any. It is best for the including the animals, to just let the ice melt. And it can kill them because it has something in it that can harm them.
Surround the stump with a heavy ring of rock salt. It's a goner.
Sulphur can kill mice and rats because it is toxic to them.
Mine did
Mice, rabbits, dogs
Rats Will Eat Anything Weither They Like It Or Not I Suppose