in a 20l i would go with a sand substrate, cover the substrate then with shells, and add some lamprologus multifasciatus. Amazing fish and that is a perfect tank for a good sized group of them.
pretty much what was said sand with shells and some shellies. I would add occellatus or brevis they go good together and look nice. The occ's are cool and have good personalitys.
hey whats up, im new to thes fish to just wondering if i could keep them with some comunity fish such as danios, silver dollors, tiger barbes and others??? it would be in a 55g, with lots of hiding places