Hello I have a small 200 gallon pond with 6 fish, 4 golds and 2 koi...they have been in the pond ince last summer, spent the Winter in there and the pond haas remained clear with the help of my 13watt uv light. Now recently I noticed the water getting cloudy and my fish not really doing much and not eating at all. Realized after I started checking things out that the uv filter burnt out had needed replceing. I have done several partial water changes because i had to wait for new uv filter to be shipped. Oh forgot to mention I took water sample to petland who told me my ammonia level was high. So I did 2 more 15/20% water changes 3 days apart. Received uv filter yesterday and hooked it up to my pump and so far nothing has changed. Fish still just hanging out at the bottom not really eating and watger is still murky looking and I dont know what else to do unless I have to wait a few more days for uv light to workl. Pond is 200 gl and uv light is 9watts. HELPPP I dont want my fish to die.