Is this Ok for base rock????

[sleezyp1]

Randy, Is this lace rock ok to use in a reef tank. Here is the discription theyHBH Enterprises - Lace Rocks
Vendor: HBH Enterprises
Lace volcanic rock is characteristically light in color due to the mixture of silica and moderate amounts of sodium and potassium. Over time these elements leave ornate streaks of sherbet-colored lace.
give.

[Randy Holmes-Farley]

It may be OK, or not. It is hard to say for sure whether too many impurities will be leached.

It is volcanic? For some reason I thought that some lace rock was CaCO3.

[jfinch]

Is it this rock? http://www.hbhnet.com/products_rocks.html

If so it looks just like the local volcanic ryolite.