Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
When I use slightly larger pebbles in my tanks (1/2" to 2" diameter) they do tend to mix with the substrate. They show up for a while, then sink down... Quite natural!
I like the dark substrate. Makes the fish and plants stand out. A subtle colored substrate is good, too. Again, the fish and plants are more noticeable, unless the fish are camouflage colored! And I do seem to like these... fresh water gobies, catfish, and so on.