So I have had an empty 29G that has never held water and I am about ready to do something with it. I really want to set up a little saltwater tank. I am wondering I have the tank filter and heater. I have an old protein skimmer (I don't know if it even works or how to work it). I am wondering if a 29G is stable enough to set up salt water, also what is EVERYTHING I need to set it up? And how much will it cost me for a 29G to turn into a saltwater. Thanks