Lost my tang and a clown? no idea why

[kien]

Originally Posted by Daniel475

ya i will get some pictures after work i think paul is coming over at 4 30 after work.. i tested for nitrate and it came back as 20.. says in the instructions if its at 50 its bad??? so ph read 8.0 nitrite was .1 really light and nitrate was 20

What is your ammonia reading? If you have a reading then those numbers suggest to me that your tank is in fact in a cycle and still in fluctuation which can be quite taxing on fish. That compounded with what I also agree is a lack of oxygen is a very bad mix of scenarios for any inhabitants. I would follow Naesco's recommendations.