the Fluval U3 offers versatility and performance in one compact unit

perfect for walks and swimming

Best For: Ponds with koi

16% Dried Salmon

PetSafe Rechargeable In-Ground Fence System carriers dog the Fluval U3 offers versatilityHow does an in ground pet fence actually work? An in ground fence works by sending a radio signal through a buried boundary wire (up to 4500 feet). Your pet wears a receiver collar that picks up the signal. When your pet approaches the boundary, the receiver collar will tone and vibrate to alert your pet that he has entered the warning zone. If he continues to venture out, the receiver collar will issue a safe but startling correction, like the static