I was thinking of a similar transfer method, Tranfer rocks with coral to the bucket, the ones without coral just wash first then tranfer to the tank immediatly(tank already up and running), I going to put all fish in bucket except mean damsel (mean damsel will go in sump for a while), then I vacumm top layer of sand in both tanks, turn off sump pump in big tank, pour sand from both aquariums into big one and let them settle, then turn sump back on, then transfer fish and corals(will acclimate in plastic bags)
If the process will take a long time, might want a heater and low yield powerhead in the bucket too...depends on time of course..
Good idea that will buy me more time
The question I am struggling with is my damsel, He has been mean in his 20 gallon to any other fish(alone for along time)
I like the fish but I don't want him to kill my clowns and royal gamma and then I have to tear apart that big aquarium just to get him out
Even with putting him in last after the other fish settle and putting him in the sump which will probably stress him a little, I don't know if he will calm down
Any suggestions, he is the same size as my clowns and royal gamma