Thanks for replying. I did cycle the water before I bought the fish. Actually it ran for about 2 weeks without any fish. I checked my levels at bginning and directly before putting in the fish. The fish seems okay now and the levels are fine. However now I cannot keep the water clear its always cloudy. I have even began changing the filter cartridge frequently. Today I did a 1/4 water change and started everything as if I was just beginning. I can't believe the problems I have been having. This isnt my first aquarium. The others have been much larger and not half as much problems. Its just recently that I have taken such a hands on approach and decided to take it on as a hobby. Im very thankful for your instruction. I have put together a small manual for myself and your extremely helpful information is on page 3.(I hope you dont mind). thanks again