if anyone was using the same rocks from X timeframe its still the essense of the tank, its pretty much all I preserve during cleanings. rocks and corals affixed remain, rest is blasted clean.
I'm not saying everyone does that or has to, I'm just saying if anyone repeats the method the outcome converges into long lived tanks, few if any variation, and corals that never get disease and you have to chip them out with a screwdriver to make room for new growth. all long term syndrome/conditions and variations are caused by storing up detritus along the continuum and the end of the continuum that blasts detritus is cheat resetting their tank to an infinite lifespan via a method of total cheating which is awesome. to occasionally rip clean a reef tank is to be at the fringing reef zone just that once with your whole setup; high energy, clean, oxygenated water, high REDOX, you can feed 10x feeding just before the rip and fatten every polyp
if anyone here considers a fringing reef zone on the GBR as a great place for coral, its possible to implement that into your tank any ole time you'd like.