Can you mix crabs and craws? Just curious... I have read everything from people keeping everything to species only so its a bit conflicting. Either way I got my tank home have to clean then cycle it and I plan to do black sand... I have a couple large pieces of drift wood in there, going to put some plants in there and maybe a couple rocks for hiding places. But I figure would be a good environment for a crab or craw def snails... probably not shrimp as they would be food. Once tank is ready and going maybe some fast mover fish but for now no fish