Anyone used this rock?

[hummer]

I'm looking into some cheap base rock to raise my live rock. I did a search and found this one thread http://www.canreef.com/vbulletin/sho...highlight=lava

Summary from link: Tuffa Rock. $0.40/lb. From Ornamental Garden Supplies.

Has anyone else tried this stuff from Ornamental Garden Supplies? Do I just ask for Tuffa rock or are there multiple types? Can I add it directly to the tank or do I have to cure it or anything?

Or if anyone has any other suggestions on where to get base rock that works...like lava or tuffa.

Thanks for your input.