I always enjoy reading this old thread:
http://archive.reefcentral.com/forums/showthread.php?s=&threadid=249112&perpage=25&pagenumber=1 and pretty much any discussion where Borneman gets into it.
from it(questions asked by members surrounded by >><<, Borneman responses in between):
>Anyway, what did you mean by "intermediate tank disturbance"? How would that help to prevent "old tank syndrome"?<<
Well, we see how ecoogical principles are pretty much happening in our tanks...and over time, systems tend towards fewer species as competition, resource limitation, habitat utilization, mortality without recruitment, etc. take hold. If we disturb populations, we free up these opportunites for "repressed" species to again have a chance. Better yet if we can periodiclly introduce new species at this time. Live rock, new sand, corals with base material, etc.
I think something like a big rock rearrangement and a big water change and some refugium work, and some coral trades and some new material added would probably qualify.
>>I would think that an intermediate disturbance would be more on the line of strong waves and thunderstorms. A typhoon would be an extreme disturbance (depending on the depth we're talking about) more along the lines of a forest fire. So possibly a wavemaker takes care of some of the minor disturbances, but how do we 'replicate' stronger disturbances?
I guess we could mimic the 'hand of God' by running our hands blindly through the tank every year or two <<
Seriously, that might be closer than you think.
>>I would also think possibly this major disturbance would be like using a powerhead and tubing to blow everything around and possibly even hand-shifting some rocks too? [except corals which would be hurt by it]
Interesting to think of this as an important part of keeping a tank long-term. Does make sense now that I'm thinking about it ... just not sure `how much' is enough?<<
I'm not sure either, but I do know everytime I've had a "disaster" - and I mean every single time, the tank is absolutely ripping about two to three months later.