85 mg Nitrofurazone per packet.
Directions for use: For best results, remove activated carbon or filter cartridge from filter and continue aeration. For each 10 gallons (38L) of water, empty one packet directly into aquarium. Repeat dose after 24 hours. Wait another 24 hours then change 25% of the aquarium water. Repeat this treatment for a second time, for a total of 4 doses. Then make a final 25% water change and add fresh activated carbon or replace filter cartridge. Treatment may be repeated, if necessary. Note: This medication will cause a slight discoloration of water which can be removed with activated carbon. This package treats up to 100 gallons. Four doses required for full course of treatment.
* Ingredients and dosage listed are for informational purposes only and are subject to change by the manufacturer. Always refer to the manufacturer and actual product label/inserts for current ingredients, recommended dosage, precautions and warnings before use.