Im thinking about taking my 10g freshwater tank and converting it to salt. im going to paint the back of it to make it look nicer. I had a few ideas but im a newb and not sure what would be best. I dont really want to spend to much money on it so i will probally be trying buy everything i need used. I would like to set up a closed loop kinda like the one on melvsreef. The only problem with that would be i would still have a heater and 3 pipes in the tank. Also would i need a filter for carbon? I was trying to think of inexpensive ways of making a closed loop that would encoroprate carbon, heater, filter floss all behind the tank (6 inches or less). Any suggestions/help would be apreciated. thanks