We are building in the Bahamas and the property is still under construction as far as landscaping etc. When the pool was constructed and filled the surrounding areas were still not grassed. The top soil that has been laid down has been blowing into the pool and as I don't yet have an auto pool cleaner I have been sweeping and letting the skimmers and drains do the best part of the cleaning. We are coming into rainy season and the winds are constantly blowing mud and debris into the pool and it is now causing brown staining. Could this be a form of rust if there are metal properties in the soils? How can I clean it up? Do I have to empty the pool to carry out any work?