From PetsMart, none. The only aquatic plant they have, at least in my area, is Amazon Sword. And I doubt it will survive with your current light setup.
Not sure about PetCo, I haven't checked out their plants in awhile. But I bet it's similar to PetsMart.
If you do get your plants from PetsMart/PetCo, be SURE to write down the names first and research them. Because I bet they won't survive underwater.
I've never had it, but I hear Java Fern is a great low light plant. But I've never seen that at either PetsMart or PetCo. Again, that could just be my area though.