I really want to go marine. I have enough knowledge from freshwater to go marine and half of the equipment. What can really stop me in my tracks is the bills. How much will it cost for: protien skimmer (good one) enough live rock for the tank to look good and any other extras that can put a dent in my wallet i have tank, filter, heater and simple lighting but i think the lights need improving. Im going for FOWLR and shrimp crabs etc. What else do i need? Also how much on the electricity does one pay for the upkeed of a 30G tank marine? My dad pays the bills so it cant be more then keeping my current tanks as they are (will sell 18G for money for marine conversion)