This is reason #2 we pre rinse all sand before using it, so that they do snow globe effect, grains fall down.
that unrinsed silt from non rinsing has lasting effects. Most people have sandbeds that go undisturbed, so recommending non rinsing is easy. It doesn’t help that the sand bags say doesn’t need rinsing, they do to a massive degree. Pure slush without pre rinsing.
if you’ve selected too fine a grain sand for sifters, that w become evident in the pre rinse habit
it does not make live sand from a bag unlive to rinse in tap water. if tap water was a sterilizer, you couldn’t drink it. Your tap water outputs millions of live bacteria into a glass of lemonade because tap is a poor sterilizer. It is a reasonable suppressant, ran constantly. A rinse takes an hour, not constant, therefore it’s not sterilizing sand to pre rinse, what an insult to bacteria to assume they’re that weak.
The only type of sand we dont pre rinse is tbs live sand, real live sand with wiggling creatures. Sifters can work that without a cloud. I’ve never seen anyone use it in fifty thousand reefs but I read about it for sale online