i completely took all the fish, gravel, and water out of this tank. so it sat bare for only 5 minutes. then i completly added pre-mixed SW to the tank. the only thing this tank has in it is the SW, filter, skim, and heater. how long should it take for this tank to be ready to accomidate some sand/live rock, and finally then some species? would it be fine to add white beach sand rather than live sand. im kind of on a budget here. where can i find the cheapest live rock too? any ideas on what to put in here? is there any kind of fish that can breed in this size of tank?