will try and get a pic up to help but in the mean time i shall discribe......
Substrate is a fine gravel which has been "live" for about 6 months.a few inert rocks on the gravel for spawning and also a nice cave made from the same rocks finished off with a large plastic plant for cover over the cave.
Hope you can get some idea from my discription. ha ha
Life is better with a fish tank in it.... And if things go wrong theres always