Even the fauna are expendable. Removing them changes nothing, having them there changes nothing. Evidence: bare bottom tanks doing fine
live rock is an alternate housing source for microfauna. Once we see the bacteria and the detritus and the arthropod / worm life is not required, only extra bioloading, we are freer to act and do things with reefs that prevent cycles. Sounds harsh I know, but it’s why we’re out 35 pages w no loss in the sand rinse thread.
that being said, if someone wants an untouched bed teeming with life, don’t rinse and try other approaches for moving, upgrading, blending beds etc. no harm
but up until recently, those life forms were deemed essential. Couldn’t be removed without consequence
once we knew sandbeds were only options, not required for nitrifying bac or for any reason, mini cycle losses stopped and full control of recycling became commonplace since we now just remove the sand (or wash it, change it etc) all at once, vs in increments. It’s safer to work all at once vs in increments, as the masses would advise.
people who are pre rinsing new bagged sand are rinsing for silt ejection, not detritus. Where many sandbed removers/changers go wrong (BRS) is they don’t down-adjust lighting in the tank cleaned, they keep full production lighting in place and it burns corals. Your corals are adapted to your lighting levels + feed rates + organic stores very tightly
ripping out organic stores means you must move down light intensity and up the feed input for a while, then you can flip beds for years in any reef and it won’t kill the system.