My pond is about 160 gallons and consist of two pieces (an upper flowing into a lower with a pump to recirculate the water). It was in an area in our backyard that received direct sunlight all day and I had a constant problem with algea and fish dying. So I relocated it about a month ago to a different area where it is shaded for at least half a day thinking it may help reduce the algea but within a couple of weeks, the water was green and murky again and you can't see in it at all. It currently has no fish in it until a get this under control. Will a UV filter cure this and if so, any recommendations as to which ones work best? Should I run a larger filter in addition to the small filter that's on the pump? (Pump is a pro flo, not sure of the model though, it's a small one from Lowes).