Anyone use this. Vitz recently mentioned it, and I remember Joe Yaiullo uses it on the 20,000g tank he cares for ( www.advancedaquarist.com/2007/2/aquarium ). I'm intrigued.
It's touchy to work with. Delbeek and Sprung mention it in Vol 3, and I suggest you give that a read. Randy Holmes Farley has talked about it on the net as well, can't remember what he had to say about it.
