https://www.reef2reef.com/threads/official-sand-rinse-and-tank-transfer-thread.230281/post-2679676
I was just discussing rinsing any old sand before putting it into a new system. Probably the best simple improvement that can help a tank transfer go well when sand is present. RInsing new sand, or old prevents cloudiness in a tank from sand for years. It won't stop detritus accumulation, but risned sand is easier to clean and a disturbed rinsed bed will avoid clouds that are common with unrinsed sand. Do it once, the tank will thank you.
Ya I screwed up once and didn't rinse sand then added a dragon wrasse. Every evening when it dove into the sand for the night they're was a cloud of dust.
One thing I've found to be very helpful is being able to keep the existing tank running while making the move. It allows you to take your time. I'm currently in the process of moving out of my SPS tank. I'm staying bare bottom tho, I run a lot of flow and don't like to deal with trying to keep sand clean looking. I added 35lbs of gulf live rock and am planning on bringing coral and rocks over slowly. My last move took a couple of months but that was because built a new scape out of dry rock and filled the sump full of live rock to seed it.
My problem with moving this time is trying not to break everything. I only moved one rock so far and already have this pile of broken branches of Copps Cali