You're absolutely right. If your home is chemically safe for birds, your aquarium is pretty safe. Bird owners in general are aware of the extreme hazards presented by scented air products, nonstick cookware, visible and invisible cooking smoke, etc. If aquarium owners actually knew what these products can do to birds, they might have second thoughts about using some of these products long-term, especially around infants and children. Canary in a coal mine...I look at it from a bird owners perspective. You have to be extremely careful with these types of things with a bird in the house, ANYWHERE in the house! If I were to burn a Teflon pan, it doesn't matter where the bird is in the house, it will harm him. Therefore if something is not harming a birds delicate respiratory system, I have no worries that it will harm my tanks