I went to the official Aerogarden site and ordered an AeroGarden Replacement Pump (go to the Accessories section of the AeroGarden site
[2014 Update: note that there are two models of replacement pump, depending on the model of Aerogarden you get. This is the old replacement pump (model 100623) that fits on the original Aerogarden with 7 pods (now known as "Aerogarden Classic 7"):
And this is the replacement pump for the Aerogarden ULTRA (model 200623). Note that they've replaced the metal contacts which tended to get corroded with a traditional plug.
If you have other models of Aerogarden (specifically the 3-pod and 6-pod Aerogardens), those use an "air pump" method that pumps oxygen through airstones; from my experience not as good a method as the pumps.]
Because I'm a sucker for anything Aerogarden, I also bought an Herb 'n Serve (it's a cool dressing and marinade maker where you throw in fresh herbs and oil/vinegar, and it does all the chopping and mixing for you, as well as a bottle), herb ice cube trays (where you can freeze chopped herbs in convenience 1 tablespoon or 1 teaspoon servings), and their "Master Chef Herb Guide", a beautiful cookbook chock full of some great-looking recipes--perfect for people like me, I mean, how much pesto can one man eat? The package came in the mail today.
So, the first step was pry open the cover underneath the pump. The plastic is wedged in there pretty good, so you need to use a flat-head screwdriver to pry the three tabs open. Don't worry about using too much force; the plastic is very thick,
The next step is to remove the old pump. Just pull up on the unit, and it'll pop out, then unthread the wire from the plastic. You'll see that the end of the cord is attached to the Aerogarden with a screw. Also, you'll see that it connects via a thick plastic tube, which was a little bit gunky. You can remove the tube using needle-nose pliers and clean it with warm, soapy water.
There's a filter which is a thin spongy square that separates the pump unit from getting too much of the gunk. For some reason, when you buy the replacement pump, Aerogarden doesn't include a new plastic tube nor filters, so you're stuck cleaning them (as much as I spend money there, I'm not going to spend $7.95 on a cheap piece of sponge). A little warm soapy water seemed to do the trick for this too.
To my dismay, when I checked my other Aerogarden unit, the motor was not working either! Had I known that I would have bought two pumps. But in desperation, I tried cleaning the gunk that had formed over the metal contacts using a Brillo pad:
That said, stay tuned, as I will be planting the new gardens tomorrow!