Balton777, First of all, dont call me a newbie. Second of all, all ACs come with ceramic rings so Im sure he has some. And turning over his tank nearly 20 times and hour is inadequate?? He said he had a 3" oscar and 2" pleco you really think at that size the bioload is big? Please use a little more common sense.
***SPECIAL NOTE TO BALTON777***
The Biological filtration media is NOT what converts ammonia and nitrites into relatively non-toxic nitrates. Nitrifiers convert ammonia and nitrites into nitrates.
Which is the question hes asking, why is it taking this long