Fender: the tank was a total loss. most of the damage was from the sprinkler system. luckily the sprinkler system is designed to only have water come out where the fire is....so no other sprinkler heads went off... but the sprinkler was running for about 45 minutes which flooded 1/4 of the bottom half of the school! We had about 50 people with wet/dry vacs sucking all the water out... then we had a professional crew come in to dehumidify the place.....
Daniel411: this was at my work, luckily noone was in the building at the time of the fire..
I am now buying a smoke detector above my home tank!