Man, I would be scared to even try. If I *had* to do it, I would shut off skimmers, return pumps, anything that sucks air, then seal the tanks with two layers of plastic duct taped at all the seams.
Honestly, I think I would call an exterminator rather than bomb. I dealt with a bug infestation a couple years ago. My house was sprayed with a product that produces no odors, and he was very careful around the tanks and the birds. I had no losses. I had to get the dogs and cats out of the house for two hours, so I moved them into the travel trailer. One treatment was all it took, and it was well worth the money spent for the peace of mind. Having a professional do it made me rest much easier, since he was well aware of the fact that I had expensive fish and even more expensive birds.