Hi, Marie. Here is what is probably a very dumb question, but here goes: We pay for "clean" water from a community well. But we also have a pond in our backyard in which we have installed a "wet well" which allows us to water the garden and to irrigate with water from the pond. Would it be a terrible idea to use water from the pond to put into the swimming pool? It certainly would save money, but I am thinking it would be a bad idea to use pond water because of the algae, microorganisms, etc that would come with the pond water. I just thought that perhaps the filter and the chlorine could possibly take care of whatever comes with the pond water... Wishful thinking or not? Thanks!