Thanks Mr. Salty. The trees are EVERYWHERE. I live in an apartment complex which is unusual in terms of trees and grass for Tucson (in we have a lot). The A/C and air in our apartment is enclosed -- unless the windows or doors are open, it circulates the air from the apartment.
The Tank: Would airtones or an air attachment to my powerhead help? I will ask the maintenance man to have our side of the complex sprayed first. He can also come back in and turn my fish pumps back on when it is safe. I could also direct a couple of powerheads to break the surface of the water.
Should I also cover the tank?
Finally, I'm not sure how long this stuff lingers in the air... how long this "threat" will be. Anyone out there with experience?