I need advice for setting up saltwater aquariums. I've joined a new Aquarium Club at high school, and while I have experience keeping and maintaining my own freshwater tanks at home, I have never before kept a saltwater tank. Any suggestions? The tanks are most likely going to be around 30 gallons, and I need some budget-friendly equipment suggestions for a saltwater setup, how to set it up, and basic care for saltwater tanks in general. Any advice would be greatly appreciated.