Selling a gently used Thomas LP60A Linear Air pump. Considerably downsized the amout of tanks I have. This has ran over 80 sponge filters with no problems. Asking $175. Was over $400 new. The link below is to the specs. Can also be used for ponds and as an aerator for septic systems.
http://www.gd-thomas.com/product.aspx?id=14136&tp=p
http://www.gd-thomas.com/product.aspx?id=14136&tp=p