Well,lots of folks in the hobby replace the sand after a move.
But that can be quite expensive with a 180 gallon tank.
I would just keep rinsing it out and soaking it with ro water and then spread it out on a tarp and let it dry in the sun.
Thanks everyone. There were no black clumps or anything that bad. The walkthru at Melevs, was pretty much what I was going to try to do. I have also been thinking of going BB, but like the look of the sand better, and just hated to throw it away.
I run it through a plastic spaghetti strainer to pull out all the crushed coral, shells, bark, ect. Then put it into a container with some bleach water and let it soak for a day. Remove, rinse, and dry out. Sand is better then new.