This is the newest layout in my small tank. 54L 60x30x30cm Juwel tank Eheim 2211 filter 3x24Watt T5s @ 8 hours per day, 6 hours 3x24, 2 hours 2x24. ADA Aqausoil amazonia (mud) 17 mini landscape rocks (pointy one's ) Plants and fish. HC, Hemianthus callitrichoides ''Cuba'' Lampeye killifish 50% Water changes every 3-4 days and I dosed 2ml Tropica plant nutrition+ daily. CO2 1bps. I grew this out without a heater in the tank and added the fish later, the fish were a good choice for this size tank IMO, perfect size really, they seem pretty happy in there now.