I have a six gallon pico tank from reef casa. And I was going to aim for a nice softy tank with some sort of triangular island and black sand. But I was thinking if anyone else has any ideas or would like to add something. After my first year of being in this hobby I am finally getting around to my second tank and I wanna make it an invert focused tank with a cleaner shrimp being the main inhabitant. Or getting one of those cool nano fish like a dragonet or a mandarin. Of course the fish will be added later down the road but I’m more on the side of just having a fish less system.