I just rinsed it in a 5 gallon bucket, ran the hose in and kept stirring it around, only took a few minutes for the water from the bucket to run clear. Some polyester "floss" in the aquaclears overnight took care of the cloudy water.
Black Diamond isn't sand, it's coal slag. Completely inert, looks like sand, but no diatoms for a month or so after you put it in the tank. Sand in general is easier than gravel to keep clean IME. It will destroy hob
filter impellers very quickly if it gets sucked up, I use sponge prefilters.