Hi Mark,
I would suggest being cautious about pest control. Many pesticides are toxic (often affecting the nervous system) and persistent. That's how they kill bugs. Way this, being around dogs, aquariums and humans.
Regardless of whether the pesticide has been approved by the EPA (or not), it does not take much education, knowledge of biochemistry, or ethics to become a pesticide applicator. I used to work for the Texas Commission on Environmental Quality, and I could tell many stories about the misuse of chemicals in the environment.
Having said all of this, what to do? If possible, try to identify the specific insect or pest that is causing the problem. Do not try to nuke 'em and kill everything. Educate yourself about the pest and possible controls - some are relatively benign. I think the library has relevant books, and the internet should be able to help. As an example, my wife was able to order through the internet a "bait" for wood ants that stopped the queen ant from producing more ants in the colony. (And, yes, wood ants are different than termites.)
I think I saw an advertisement for a pest control company in Austin that claimed to use "natural" or "biological" controls, or something like that. I suppose they should be in the Yellow Pages.
Anyway, consider it, and good luck.
Roy