i just added about 2" of ls to my 2 - 2 1/2" ls bed and used the "baggie" method mentioned above.......worked great. As far as a uniform depth throughout the tank, it's futile to even try....my engineer goby and diamond goby prefer to do the landscaping (sandscaping)and I guess they are never content with their creation 'cause they change it constantly! <img src="graemlins//urrr.gif" border="0" alt="[urrr]" />