where to buy salt and sand?

[Ruth]

Well my bad then because I always thought that Reef Crystals was a Kent product - maybe because Kent and IO used to get manufactured in the same place.
I was one of the (un)fortunate ones a few years back that got the bad IO salt and completely crashed both of my tanks so I will never use it again.
Sorry for the confustion.
For the record I use the Tropic Marin Pro salt and the Seachem Reef salt and am happy with both.