I have a planted ten gallon aquarium with six neons, and am looking for some sort of catfish, figured pygmy cories would be the best, but I cant seem to find a place to buy them. I m in Maine, so I dont think aquarium shops would have them, and liveaquaria doesnt either, any suggestions, and how many would you think I could add without overstocking the tank. I was thinking 4-6. Thanks in advance