I have moved 100g+ systems a handful of times. Went well each time.
Plan on it taking a day on its own. Don't plan on moving a whole house and tank at the same time.
Get water mixing at the new location.
Have bins or trashcans for moving submerged rocks.
I never reuse old sand.
It's not...
I glued 5 frags of this acro to a rock and one of the 5 hasn't grown much but kept it's color. The others are growing like weeds and lower color concentration.
4 fish in 100g and undetectable nutrients with Salifert.
The crabs might be acro crabs. They don't have a ton of benefit to the corals but they also don't hurt anything. They get very stressed away from a colony though. Best to leave them alone.