NEA is Coming to Spray Potent Insecticides

My fishes in the pond are not surviving.  Just replenished with fresh batch of fishes and they all died in a couple of hours.  Tomorrow NEA is coming again to give double dose.  So I have to change my water again.  It is terrible.  I have a hard time maintaining my aquarium.  Now I have one lone goldfish.  If tomorrow, it cannot survive, I will change the water again.