City of Orlando Fire Department responded to a confined space rescue at 2725 Conway Rd. in East Orlando. Units arrived to find a 32 y/o male who had fallen 20 ft down into a water treatment tank. Pt. was removed with serious injuries. Units responded E6, 11, Tower 11, 1 Rescue 8, Haz-Mat 1 District 3, Division 1 and Air 2.