Found this while looking for online sources of Hydroton, the clay ball aggregate. They don't have them instore just online if you buy $45+ worth of stuff its Free shipping, which is amazing considering how much it must weigh. I'll take pictures of it when i get it so you can see the quality. It seems like a great deal with Hydroton costing so much/ shipping being very high.
http://www.homedepot.com/p/Viagrow-50-lt-ViaStone-Hydroponic-Gardening-Grow-Rock-Medium-VS50-GROW-ROCKS/202985175#.Undp9xBHXkI
Theres also a 30-Pack of 50L bags and a 10L bag
30-Pack 50L Bags
http://www.homedepot.com/p/Viagrow-50-lt-Viastone-Hydroponic-Gardening-Grow-Rock-Medium-30-Pack-VS50-30/203671338#.UnduxRBHXkI
10L Bag
http://www.homedepot.com/p/Viagrow-50-lt-ViaStone-Hydroponic-Gardening-Grow-Rock-Medium-VS50-GROW-ROCKS/202985175#.Undp9xBHXkI
http://www.homedepot.com/p/Viagrow-50-lt-ViaStone-Hydroponic-Gardening-Grow-Rock-Medium-VS50-GROW-ROCKS/202985175#.Undp9xBHXkI
Theres also a 30-Pack of 50L bags and a 10L bag
30-Pack 50L Bags
http://www.homedepot.com/p/Viagrow-50-lt-Viastone-Hydroponic-Gardening-Grow-Rock-Medium-30-Pack-VS50-30/203671338#.UnduxRBHXkI
10L Bag
http://www.homedepot.com/p/Viagrow-50-lt-ViaStone-Hydroponic-Gardening-Grow-Rock-Medium-VS50-GROW-ROCKS/202985175#.Undp9xBHXkI