that requires positive pressure to overcome the water. There is no real pressure from a fog machine. The result would be water filled tubes.
While i like the concept of using the water as a cold source, that probably will only work in very limited situations. The water dose not chage temp as quickly as the air, so a cooler pond requires warm air. A warm evening often follows a warm day, which would of course raise the pond temp. You see where im going. Air temps change so much, Im guessing using the pond as a cold source would be fickle at best.
Mid State Scare - San Luis Obispo and Santa Maria's favorite Haunted House
2013 - Hmmm, we shall see what gets conjured up