A wand comprising: at least two aerated foam projecting nozzles for discharging foam around an inside tank wall surface; a first ambient air aeration chamber (AAAC) located upstream of, proximate to and in fluid communication with the at least two aerated foam projecting nozzles; and a riser, wherein the nozzles and chamber are attached to the riser for communicating water and foam concentrate, further wherein said at least two nozzles and riser are structured in combination for attachment to a tank wall of an at least 100 feet (30.48 m) diameter tank; characterised in that: two of the at least two nozzles are configured for projecting aerated foam in a substantially focused stream and within +/- 15° of a horizontal direction around an interior top tank wall surface; the chamber (AAAC) is configured together with the nozzle for projecting at least 100 gpm (0.45 m 3 min -1), at 100 psi (689476 Pa), of aerated foam having an expansion of between 2-to-1 to 8-to-1; the nozzles each comprise at least four fins, wherein each fin has a longitudinal dimension greater than a radial dimension and terminating substantially flush with a nozzle tip discharge orifice (; and two of the at least two aerated foam projecting nozzles are structured in combination such that the angle between two discharge axes of two nozzles, taken in the direction of discharge, is between 180 0 and 150 0. at least two aerated foam projecting nozzles for discharging foam around an inside tank wall surface; a first ambient air aeration chamber (AAAC) located upstream of, proximate to and in fluid communication with the at least two aerated foam projecting nozzles; and a riser, wherein the nozzles and chamber are attached to the riser for communicating water and foam concentrate, further wherein said at least two nozzles and riser are structured in combination for attachment to a tank wall of an at least 100 feet (30.48 m) diameter tank; characterised in that: two of the at least two nozzles are configured for projecting aerated foam in a substantially focused stream and within +/- 15° of a horizontal direction around an interior top tank wall surface; the chamber (AAAC) is configured together with the nozzle for projecting at least 100 gpm (0.45 m 3 min -1), at 100 psi (689476 Pa), of aerated foam having an expansion of between 2-to-1 to 8-to-1; the nozzles each comprise at least four fins, wherein each fin has a longitudinal dimension greater than a radial dimension and terminating substantially flush with a nozzle tip discharge orifice (; and two of the at least two aerated foam projecting nozzles are structured in combination such that the angle between two discharge axes of two nozzles, taken in the direction of discharge, is between 180 0 and 150 0. two of the at least two nozzles are configured for projecting aerated foam in a substantially focused stream and within +/- 15° of a horizontal direction around an interior top tank wall surface; the chamber (AAAC) is configured together with the nozzle for projecting at least 100 gpm (0.45 m 3 min -1), at 100 psi (689476 Pa), of aerated foam having an expansion of between 2-to-1 to 8-to-1; the nozzles each comprise at least four fins, wherein each fin has a longitudinal dimension greater than a radial dimension and terminating substantially flush with a nozzle tip discharge orifice (; and two of the at least two aerated foam projecting nozzles are structured in combination such that the angle between two discharge axes of two nozzles, taken in the direction of discharge, is between 180 0 and 150 0.