Been doing this pond thing for 25 years +. I learn something new every week, mostly from this forum. Trying to get caught up on pond and yard work after 5 years of distractions. Just got around to pulling skimmer and UV that were put in this spring. Got all the equipment put away and now my one pond has gone totally green! Visibility at 3", last week I could see all the way to the bottom at 5'. Added lilies hanging from the sides of the pond and window box bogs are doing great. Why is my water green???? DUH!!!!!! Before and after pics of latest project. Possible full sun???