I have only had my pond a few weeks. My levels are fine for ph, nitrates, nitrites, and ammonia. I am happy with my pond however my husband is freaking out because the water is green. I had expected this and understand it is part of the new pond process until my ecosystem is running strong. However he thinks it is an eyesore and basically we have created a giant mud puddle in our yard. I keep telling him it's natural for this to happen but patience is NOT his strong suit. Now after consulting some "pond pro" he is talking about buying a uv light. Is this a good or bad thing? I wanted to upkeep my pond with as few chemicals as possible and let nature takes it course. In the mean time, is there anything I can do to clear up the water and get him to settle down a little?!