I'm just sharing my personal experience, your results may vary!
I rinsed about 150 lbs of DSB when I moved 2 years ago and encountered no problems at all. I did have to rinse 1/2 a 5-gallon bucket at a time and so it took a long time to rinse out completely. I moved all of my 120-G corals into the new 210-G after the sand rinse and did not lose any.