I came home tonight and my big Green Millipora looks like it is going to die! The skin is coming off and it is not extening its polyps. The only change I have made is to replace the drain hose. My fear is there was something on the hose and it is now in my tank water. I don't know...oil maybe?!
Is there a way to test for oil? My skimmer is not making skimmate right now either so I think that also means oil, right?
I'm gonna do a 30% water change in the morning and I changed out the carbon, but is there anything else I can do?
