Great Thread! Maintainance, Maintainance,Maintainance, and then more Maintainance! The Idea that "if it works, don't fix it" is just plain wrong, not only in reefs, but anything else in life that is worthwhile. My dentist always said "if you ignore your' teeth, they'll go away". I believe him now (I've still got MOST of them).
If you settle back to watch instead of being actively involved with your' tank, I fully expect that you'll get to watch it go into a slow, but steadily increasing, downward spiral that one day leads to "Oh no, my tank is crashing"(I speak from past experience here). It's my belief that OTS is really ignored tank syndrome. I got very complacent early on, and had the symptoms of OTS after just a year and a half or two. Yup, it crashed, and it took about two years to set it right after this "Benign Neglect".
I was very diligent again for a couple of years, and my tank thrived. Yup, time to "Sit back and watch again". Some of us have to learn the hard way twice!
On a more positive note, I've gotten off my can, and have things headed in the right direction again. Research is being done, the algae is on the run, weekly water tests are again being performed (and on a LOT more parameters than before), water changes have become more regular and larger, and, surprise!, my tank is looking better every day.
Beware the Ignored Tank Syndrome!
Dean