hey guys, i am getting a 50 gallon saltwater aquarium soon and i was wondering what i wail need to put in the water. i know that i need salt, i already know where i can get that, but i was wondering how much calcium, iodine, and anything else i will need for my tank. i mill be getting a tank with live rock and sand, and a raccoon butterfly shrimp, 2 fire fish, 3 clownfish, 1 flame angel, 1 orange stripe goby and 2 or 3 shrimp. what else should i put in the water and how much? any input would be appreciated. thanks!