Hi everyone I know I keep asking all sorts of questions but you guys really have helped me understand so much since I joined this site.. I have another question I know in the summer time the pond water disapates but what about now in the winter time. My pond water is about 4" low and all of a sudden the water seems to be getting dirty, not just from the algae its not clear like it has been . Is this normal or should I be concerned about it.?