We have used Ace Pest Control for years. They come once a month and do inside and out. We spoke with both the office and the guy who actually comes out and they assured us that they understand the intricacies of pest control around aquariums and ponds. Our tank was fresh water up until last year so that means they treated our house for 16 years with not trouble in or fresh water. The ponds have had fish for a least 6 years and are adjacent to the house and have never lost a fish. The salt water tank/s have been running for a year this July with absolutely no issue.
If they are worth there beans, they should know how the chemicals they use affect pets and fish. If they don't know that, I think it is time to find a new exterminator. Hey, I hear Arnold is unemployed!