Desperately missing one thing: hydrometer. You need this to measure the salt level. I would recommend shotting for a specific gravity of 1.026, which is the natural salinity of the ocean. You will also need some suitable test kits for marine aquariums. Nothing fancy, just ammonnia, nitrite, nitrate, PH. You will need about 1/2 cup of salt to a gallon of water to make a SG. of 1.023. You will need a seperater mixing container and a heater and air pump or preferably a powerhead to mix water for changes. about 10-20% weekly should do ya. Have to mix the salt for 24 hours before using it to allow the PH and salinity to stabilize. You are looking for a PH between 7.9-8.4. this shouldn't be too hard because most salts will naturally buffer to that level. Your gonna need a few weeks to cycle the aquarium. You can use cheap hardy fish like damsels, buy uncured Live rock and let it cure, or stick a raw shrimp in your aquarium and let it rot. Also if you can afford it a protien skimmer. Ask if you have more ?'s. g'luck