Woah, nice

Ruby has been saying "woah, nice" a lot lately. She didn't see them
but I have a feeling she would have said it when I discovered the
toads living in her swimming pool. I went to check out some flowers
and noticed it was full of water. I was going to dump it out when one
of the four toads jumped into the water. I was startled and then
laughed but am not sure I want to leave water in there for Mosquitos.
Or would the toads keep them away?