Precor IGR Concentrate should NOT be applied to animals at any dilution. It is not labeled for a safe usage. We do carry products such as Martins Flea, Tick and Mange Dip. When following the instructions on the product label for Martins Flea, Tick and Mange Dip it should not harm your dog if he licks after drying. Sensitivities may occur after using ANY pesticide product for pets. If signs of sensitivity occur, bathe your pet with mild soap and rinse with large amounts of water. If signs continue, consult a veterinarian immediately.
If a bit of water touched the Precor IGR Concentrate treated area, it should be fine. It will not reactivate the product. If the carpet was steamed or shampooed, then some of the product will have been removed.
The manufacturer of Precor IGR Concentrate does not recommend any specific type of water for mixing. Regular tap water would be fine to use.
While Precor IGR shouldn't harm fish if used appropriately, you would need at miminum to cover the fish tank while spraying and until everything has dried and settled. If its easy to remove the fish before spraying then I would do so, but if not, just covering them with a sheet or fabric to protect from particles getting in the water or filter would be sufficient.