Seachem Ammonia Alert Sensor DogClothesBootsCategory_Shirts The Passport Key works with

The Passport Key works with the Passport Pet Access Smart System and can be used for an additional pet using the Passport or as a replacement if your pet's Passport Key is lost

It helps your dog feel so good on the inside

vitamins and minerals carefully selected by holistic veterinarians and animal nutritionists

Replace a SmartKey™ or add more pets to your PetSafe® Electronic SmartDoor™

Seachem Ammonia Alert Sensor DogClothesBootsCategory_Shirts The Passport Key works withAmmonia Alert is an innovative color device for continuously detecting and monitoring toxic free ammonia. A sensor changes reversibly from yellow to green to blue, relative to the ammonia concentration. No test kits, chemicals, or procedures are needed. The device detects less than 0. 05 mg L (ppm) free ammonia and alerts you to the #1 killer before any sign of stress. It lasts over a year. This product is not recommended for use at acid pH. Marine or