i have a 72 bf tank now just got my buddies 150 gal ay suggestions on the change over i have to break down the 72 its a reef tank and put the 150 in its place just trying to figure out the best way.
Use as much stuff (rock, sand, etc) from the 72 as possible in the 150. Honestly there is no other easy way of doing it other than putting your stock in buckets while you're swapping the tanks over. Mix up new water along with the old, add all the rock and sand and wait and test. If everything seems the be stable then you can add all your fish and coral back.