the reason we'd deep clean is because upwelling waste in the new tank is not beneficial to any degree at all.
but installing sand that can't cloud, and rocks that were swished in saltwater clean before set back in new tank (they have no clouding attached waste now) is perfect and very well documented. even if you can just drain and slide it, refilling back on top of that sand isnt the same as leaving that sand alone, it moves around the waste and you risk big invasion upsets the next few months. there's no setting in which a cloudy sandbed is preferable to a laser clean one. when physically handling tanks, the cleaned ones always live and the loss examples we can find were from those who refused to clean. thats the % breakdown as I see it lol
if you want to see the jobs ill show the thread of the work. they're all the same
take down tank, blast clean all sand in tapwater for hours until clear
final rinse in ro to evacuate tap, now the sand is cloudless and can't cause a recycle.
swish old rocks in old tankwater to cast off waste
move tank, reset up perfect sand
and rocks
match only temp and salinity to the old setup no others need match
also drop your light intensity to re ramp back up in the new tank, not full blast power after cleaning. that action is what we have fifty pages of, so the initial concern over tap rinsing sand wouldnt factor. its core to the method
if you move without cleaning the sand, based on the avatar pic and ratios/cleanliness I give the tank a 75% chance of total success, a ten pct chance of total crash, and 15% chance of cyano issues within a month but nothing severe. We have examples on page one showing total fish loss in moving unrinsed sand, that’s where 10% came from
and if you move clean sand, only perfection results on the other side not any bad outcomes. deep cleaning a sandbed adds the most lifespan to your reef of anything you can do physically to it or buy for it. its your one chance to change out the waste vs always fight it with various nutrient controls for the rest of the life of the tank.