I live in Florida which in the summer months is filled with mosquitos, and I just installed a fresh air line this afternoon, and I wanted to see the results. I was sitting in my house and heard the hum of a Mosquito truck which sprays pesticide into the air in an attempt to kill mosquitos. I immediately pulled the fresh air line inside and am now concerned with the potential for significant issues. My fresh airline is about 50 feet from the street where they spray. What would be the effect of this in my aquarium? How could I run a fresh air line and prevent incidents like this?