Early this morning, members of the department responded to a report of smoke inside the ACME Supermarket. When 2481 arrived, he confirmed the smoke condition. Crews found a tank to be the cause of the smoke. A small fire inside the electric components was extinguished and the area was checked for extension. While there was no extension, there was a moderate smoke condition. Crews remained on scene to vent the structure. Once the store was vented crews picked up and returned to service.