well today i think i may start my nano sw 6gl...i have done some research on how to do it and thgings i need to buy...i think i am going to go with 2-3 small sw fish(not sure yet what ones) and rock and coral....what is the best type of substrate i should get...should i just buy crushed coral...also more importantly should i buy the water from the store already sw or just make my own...is it cheaper to just buy bags of salt and use purified water or can i use tap water.... *celebrate