The fish all seem to really like the roots! All the roots are from pothos cuttings that have been in this tank for about one year, maybe a little longer! There is a large piece of driftwood in this tank, and some larger river rocks, and the substrate is half rounded pea sized river gravel and the other half is light colored sand (caribsea super naturals brand that I got from my local petco). I also have a few java ferns and a few anubias and a few marimo balls in this tank as well (had the marimo for a few years prior to the recent zebra mussel scare in the US).