Save yourself $15 plus the cost of shipping and taxes. This unit is pretty much brand new. I completely disassembled the unit and soaked/cleaned in vinegar. I also have brand new never used pipe to go with it. Pick up in Palm Harbor. Cash only.
http://www.bulkreefsupply.com/brs-gfo-carbon-reactor-dual-1.html
http://www.bulkreefsupply.com/brs-gfo-carbon-reactor-dual-1.html