There is no air pump and no air hose included. I sorta didn't expect th air pump to be included because it was a low price for the filter. But, I zoomed in on the box and the printing on there said something about how it aerates the water, so I thought maybe there was a small one in the box. There wasn't. The instructions aren't even very clear on the fact that you need to attach an air pump. Once I got it installed, and attached the air pump (not included) to the air hose (not included), it seems to be working just fine. As a side note, the cartridges need to be rinsed really well before use or they will cloud the water pretty bad.
ProsThis was the only small under gravel filter I could find for the small hex beta bowl I have.
The little plant is a nice touch
ConsNeed to buy air pump and air hose separately.