I have a 20 pound CO2 tank with a two gauge regulator for sale. I just had it refilled a couple of weeks ago and decided to turn the planted tank into a saltwater tank. I will sell it for $75.00 or would be interested in trading for lights for a 55 coral tank. I live in Comer, Ga, but go to Atlanta and Anderson SC every couple of weeks. Let me know if you are interested and live near these areas because it is to heavy to ship. Thanks, Kim