Here is a link to a Craigslist posting from April. This is the Southdown sand. I have seen a number of references to is as an acceptable sand for reef use on WetWebMedia.com.
I used to buy southdown sand at HD. Not sure if they carry it anymore. They changed the name several times. Last time I bought it, it was called "caribean playsand".
That's too bad about the "white" sand at Menards on HWY 100 being silica.
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