Hi everyone, I've got one lone Dojo, I've been reading around, and I read that Dojo's like to burrow under the substrate, well my gravel is a bit large for this type of behavior, so he lays next to his hideouts, sometimes in, sometimes out, he seems happy though. I may be re-scaping this tank in the next couple of weeks, should I buy a more "Dojo freindly" substrate? Or will he be OK with what I've got (I'd prefer to keep my substrate if possible).