These are the directions that came with my Praziquantel....
Prazi.... an effective and safe med for the treatment of gill and body flukes, tape worms, and other cestodes and tremotodes in ornamental aquarium fish. May be effeective against capillaria when administered in the food.
Bath.... 100mg/10 gal (1/4 tsp/20 gal)
allow meds to remain in the tank for 48 hours. Mechanical filter may be running- no carbon or other chemical media. On the third day begin daily water changes of 10 to 30% for the next 5 days. On the 7th day repeat the entire process. On day 14 a third treatment may begin. This would be prudent for tanks with gravel substrate , and no undergravel filter..
Fast bath.... 1/2 tsp /10 gal prazi to a small medical tank. Insert affected fish for 2.5 hours
Food.... Mix 1/2 tsp prazi to 1/4lb food. Typically used is beefheart or beefliver ground in a blender and frozen for future use. 2-3 feedings every other day should be sufficient.
prep in water , it doesn't go in well, shake or mix vigorously. In acetone , mix 3 parts acetone to one part prazi, then pour chalky substance over the tank water... be careful as it too much acetone will cause oxygen depletion....use only pure acetone.