Re: Mosquito Dunks okay to use in their water?
There should be no problem with BT in a fountain.
Bti [Bacillus Thuringiensis subspecies israelensis]
has not been reported to affect a large number of other invertebrate species including most aquatic fauna. It is not toxic to bees. Fish are not affected, either in the laboratory or after field application.
ultracrepidarian >> noting or pertaining to a person who criticizes, judges, or gives advice outside of his expertise