I love this Premiere Pet Fountain. It comes with everything you need to get started  for your pets to have fresh filtered water. You can control the water flow with the adjustable flow knob, the water is constantly circulating which helps with preventing bacteria growth it also comes with a carbon filter to remove odors and bad taste. This fountain is perfect in helping you keep your babies hydrated. It's really easy to clean and it's even dish washer safe. I don't recommend for bigger dogs my big boy ended up having water all over the floor but it's perfect for smaller dogs and cats.