I was inspired by another thread about going gravel-less. I wanted to try it because I don't like cleaning little bits of gravel.
I'm thinking about scattering a few larger things like river rocks or something around the bottom of Max's tank here and there.
So, here we have (in order) Maximus in a 10 gal, Uncle Sam, Bravo & Mango in their 3 gal tanks.
There is no gravel in Max's tank at all, and only a sprinkling in the other tanks. It looks like there is a lot more in the smaller tanks than there really is. They are all happy & blowing bubble nests.