Yea, Calcium based -vs- silica based.

You are just about limited to CaribSea or if your lucky to live
in an area where Home Depot happens to stock Southdown.
CaribSea has a pretty big slice of the market.

A friend of mine bought a Train Car Load of sand from the
Caribbean supplier of SouthDown and sold it off as AcroTech Reef Sand.

He had access to a loading dock and Magnet/Screeners.

I sold off a few pallets of it in my area. It was really nice stuff
and sold it for half the price of CaribSea. So everyone was happy :-)
The area Home Depots wouldn't stock SouthDown.

Now some Pros use silica sand and report no ill effects.
My island is completely pure white sugar sand but it's Silica based
(Santa Rosa Island)
But I went with CAL based sand for my SPS tank. But I used my "Yard" for
the Nano tank :-)



John Maag wrote:

Is cal calcium or California. What do you use if not CaribSea aand
Southdown?




--
Ric Seyler