Hi, have had a back yard pond for 7 years now. Just recently we had to replace the liner and ended up with a larger pond. As expected the water was beautiful for the first week. Now it looks like pea soup. I have two filters one with a uv light, that still indicates the light is lit. But I was wondering if maybe the uv part may have stopped working. Does any one know about these things. Also I have tested the water and all is well except I do not have a tester for salt, which I will pick up today. Have added salt but thinking not enough yet! Glad to have found this forum. Thanks in advance for you input.