Selling my Twinstar. Worked great but it is only rated for a tank about 50gallons. My tank is 125 gallons. Was hoping that it would somehow work. Did excellent work for about 1/3 of my tank!! Great shape. Bought it from someone used and have had it for a couple months. It is $279 brand new (the guy gave me the original receipt). Willing to let it go for $175. See links below for additional info on it