I've changed my white gravel a few weeks ago to black sand.;-)
Full Tank Shot
Still have to add the black background later hopefully. Sponge filter absorbed the white particles from the sand (and sand doesn't look black from the light).
[URL="http://i143.photobucket.com/albums/r155/Blue_076/Picture006.jpg"][/URL]
[URL="http://i143.photobucket.com/albums/r155/Blue_076/Picture005.jpg"][/URL]
[URL="http://i143.photobucket.com/albums/r155/Blue_076/Picture004.jpg"][/URL]
Full Tank Shot
Still have to add the black background later hopefully. Sponge filter absorbed the white particles from the sand (and sand doesn't look black from the light).
[URL="http://i143.photobucket.com/albums/r155/Blue_076/Picture006.jpg"][/URL]
[URL="http://i143.photobucket.com/albums/r155/Blue_076/Picture005.jpg"][/URL]
[URL="http://i143.photobucket.com/albums/r155/Blue_076/Picture004.jpg"][/URL]