what should i get and do before starting. i dont want to hurt/kill the fishies. looking on doing brackish tank, looking at 2-3 crabs few shrimps and maybe 2-3 fish. thanks for any advice
Yeah, you'll definitely have to do a lot of research on crabs.
You could change them out for crayfish? They are somewhat agressive, but don't need the surface area that crabs do.
You would have to research what crays are least aggressive but you could potentially add a couple of fish in with them.
what r some low light mosses?