how should I wash my new sand.
I am getting massive amounts of it

manufacturer suggests making a hole in the bag, sticking a hose in it and flushing it until the stuff that runs out of the bag gets less milky looking.
potential con: tab water

or should I pour the sand in a big tab and slosh it around in RO water?

both? or something else

I have a bottle of prime on hand (dechlorinator and also ammonia detoxer)
If I use tab water with Prime will it affect cycling (will the bacteria be able to eat the altered ammonia, will the altered ammonia show up in my test kit)?