Pet Safe In-Ground Fence Add-A-Dog Stubborn Dog Extra Receiver UV Sterilizers & Accessories the ppm level of these

the ppm level of these elements must be maintained within a narrow band and therefore should only be dosed according to a measured requirement of the aquarium

Easy to empty

preventing it from drifting around your tank and keeping your water crystal clear

Lab Grade ORP Probes are accurate and long-lasting

Pet Safe In-Ground Fence Add-A-Dog Stubborn Dog Extra Receiver UV Sterilizers & Accessories the ppm level of theseFor use with PetSafe In Ground Fence Systems. Great for larger or more stubborn dogs. Highest intensity level available. 4 adjustable levels of correction plus beep only mode with vibration. Waterproof collar. 3 Year Warranty.