I just discovered the AAOM (Advanced Aquarist's Online Magazine) and really liked what I saw -www.advancedaquarist.com. (I found it through researching Righty's info.) I was reading through some articles on new tank setup mistakes and saw all the usuals, "overstocking", "no GFCI", etc. etc. But one thing I saw baffled me -"Too much bio filtration" was mentioned a couple of times. I was of the belief that there was never such a thing. You can have too little nitrate removal or too few water changes. Is this the whole "wet/drys are nitrate factories" thing? Doesn't everyone want every bit of ammonia converted? Isn't the final stage nitrate? and eventually, possibly nitrogen? I have been out of reef keeping for a while - has something changed?