I'd go with different types of neo shrimp as well if you're looking for multiple specimens in a single tanks. Crayfish do best when kept alone, they will fight & try to kill off eachother.
Yeah, absolutely. I have nerite snails & Malaysian Trumpet snails in my shrimp tankYou can at least do shrimp and snails correct?
Crabs and craws will fight for territory and to kill each other. Also when it comes to crabs they "must" have access to open air to molt properly. So you would have to have a ramp for them to get out of the water so they can she'd their shell and harden the new one in the open air without getting wet during the process.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