I will only comment here because I used one bag of that sand when I started up my tank. I also used a bag of the carib sea oolite dry sand. Didn't rinse either bag, just put in the dry sand and then the "live" sand on top. If you lay the empty sand bag down on top of the sand and slowly fill the tank with something slow like a maxijet900 (what I used), directing the water on top of the bag instead of the sand, it won't create very much of a storm at all. It took about an hour or so to fill the tank because of the slow pump and head pressure, but it worked and I barely had a sand "storm".. The bag floats up with the water level as it rises so the water from the pump never directly hits the sand. Take that for what it's worth, which may not be much.