You will be OK. Search around other forums, as with every thing else in SW you can find varying opinions on every subject. The "curing" Kip4130 suggests is basically nothing but a short rinse like I suggested (put sand in container, fill with water, let set (cure), pour water out) I'm sure no one here really thinks that the floating "plant-like" matter that floats to the top should be added.
I am not Flaming Kip or Bang, lord knows they know more than I do. I'm just saying that for every knowledgeable person that says don't rinse there are as many that say do rinse and some that say rinse it real good.
Its like the DSB in general. Search and you will see that:
DSB=Good
DSB=Bad
DSB=Nitrate sink waiting to explode
DSB=Best thing for SW since SW