just the two. the last one was a split seam on a reactor that sprayed water all over some plugs. It was a near catastrophe because it was directly under one of my return lines. One of my ballast power cords melted down, a DC4HD completely disintegrated, the return line was scorched and covered in soot , and there was an inch+ of water on the floor.
Smoke billowing out from under the tank, and circuits tripped all around. I walked through the water and flipped the sub panel circuits back on, and they emmidiately popped back sending another cloud of smoke into the room. I came very close to a total tank drain that day.
It was sweet.