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Romet 30

This page contains information on Romet 30 for veterinary use.
The information provided typically includes the following:
  • Romet 30 Indications
  • Warnings and cautions for Romet 30
  • Direction and dosage information for Romet 30

Romet 30

This treatment applies to the following species:
Company: AquaTactics

Romet 30 Caution

Federal law restricts medicated feed containing this veterinary feed directive (VFD) drug to use by or on the order of a licensed veterinarian.

Sulfadimethoxine & Ormetoprim Type A Medicated Article

For trout, salmon and catfish

Active Drug Ingredients

Sulfadimethoxine 113.5 grams per pound (25%), ormetoprim 22.7 grams per pound (5%) in a carrier suitable for incorporation in feeds.

For use in manufacturing medicated feeds only

Romet 30 Indications

For the control of furunculosis in salmonids (trout and salmon) caused by Aeromonas salmonicida and of enteric septicemia of catfish caused by Edwardsiella ictaluri strains susceptible to the sulfadimethoxine and ormetoprim combination.

Preparation Of Medicated Feeds

Establish the weight of fish to be treated and calculate the amount of feed needed per day according to fish size and water temperature. Calculate the amount of Romet® 30 required for medicating the feed at the rate of 16.7 g of Romet® 30 per 100 kg (7.6 g of Romet® 30 / 100 lbs) of fish body weight per day.

Medication Of Feed Before Pelletizing Or Extruding

Thoroughly mix the calculated amount of Romet® 30 into the mash feed prior to pelletizing or extruding. Refer to the dosage table below for recommended levels of use.

Feed Intake of Fish as Percent (%) of Body Weight

Lbs of Romet® 30 per Ton of Feed













Medication Of Feed After Pelletizing

Prepare a liquid slurry by suspending Romet® 30 in edible vegetable oil or a 5% gelatin solution. Coat the pelleted fish feed with the slurry, which should be constantly agitated to ensure uniform suspension of the Romet® 30 during addition. As a general rule, 10 gallons of slurry is required to coat 2000 lb (1T) of pellets. The coated pellets should be allowed to dry prior to bagging.

Rebag and store under proper feed storage conditions.

Use / feeding Directions

Administer medicated feed daily for five consecutive days to provide approximately 50 mg of active ingredients per kg (23 mg/lb) of live body weight of fish per day.


Store dry in closed bag at or below 25°C (77°F), excursions permitted to 37°C (99°F).

Romet 30 Caution

If fish show no improvement within 2 to 3 days, or if signs of disease reappear after termination of treatment, reevaluate management practices, diagnosis of outbreak, and establish susceptibility of the bacterial isolate(s) to the drug.


Withdraw 42 days in salmonids and 3 days in catfish before slaughter or release as stocker fish.

Labels for feeds containing Romet® 30 must contain appropriate indications, limitations and warnings as well as required feed ingredient information.

NADA 125-933, Approved by FDA

Distributed by AquaTactics Fish Health, Kirkland, WA

PHARMAQ, part of Zoetis

Net wt


50 lb (22.68 kg)


CPN: 1826000.2

12015 115TH AVE. N.E., SUITE 120, KIRKLAND, WA, 98034
Telephone:   425-629-8099
Fax:   425-629-8095
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Copyright © 2023 Animalytix LLC. Updated: 2023-02-28