Thomas Labs Fish Doxy uses Doxycycline powder to exert a powerful batericidal action on gram-positive and gram-negative bacteria, and controls a number of common fish diseases including septicemia, mouth rot, and fin and tail rot.
Directions: Add one packet (100 mg) into aquarium for each 15 gallons of water to be treated. Repeat in 24 hours. It is suggested that a partial water change be made between treatments. While duration of treatment depends on type and severity of infection, it is recommended that extended medication baths continue for a minimum of 5 days & for not more than 10 days. Discontinue treatment if no improvement is noted within 5 days. To remove harmless yellow color, change 20% of water and use charcoal filter until clear.
Ingredient: Doxycycline Hyclate (100mg per packet).
Note: 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 human consumption.