Has this happen to anyone before? Last Friday, I changed the water in my tank and cleaned my AC110 and my 305(also have 405 but didnt clean it). I rinsed the media in old tank water and decide to remove the ceramic media from the AC110 and replace it with carbon because I had some medicine in the tank. I woke in the morning and my tank is damn near pitch black. I rinsed the carbon pretty good before I placed it in the filter. What can I do to remove it, or I just have to change the water everyday to remove it? I can barely see the back of the tank. All the fish seem fine, its just pitch black.