Thomas Labs now manufactures and sells Fenbendazole which is the exact same medication that is in Panacur C, a popular dewormer medicine. Thomas labs sells it in 250 mg strength and it comes in packets. You can purchase 3 or 12 packet quantities, and it is pretty cheap. The 3 packet quantities only cost $3.95
Manufacturer Description:
Fenbendazole is used as a worming agent in tropical fish and is extremely effective in both fresh and salt water environments. It has replaced levamisole (Discomed) since the fish do not build a resistance to it. Fish Bendazole works so quickly that you will usually see worms protruding from infected fish within an hour!
Packaging comes in 3 and 12 individual packets
DIRECTIONS: Mix one packet with approximately four (4) ounces OF FOOD and let soak for 30 minutes.
Suggested Use: Can be used in a hospital tank for single fish or in main tank populated by fish only. Best used in combination with a fish antibacterial polymer to increase palatability and reduce loss of medication to water. treat for a 3 day duration with water changes and filtration between treatment.
Caution: For aquarium and ornamental fish only. not for human use. keep out of the reach of children. keep container tightly closed and in a cool dry place, not to be given to fish intended for food use.
){kind=link}