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Fish sulfamethoxazole 800mg

Fish Sulfamethoxazole 800mg is a broad-spectrum antibiotic used to treat bacterial infections in ornamental fish, including gill disease and fin rot. It helps promote a healthy aquatic environment.

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Price : $19 - $114
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$19
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$57
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$114
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SKU : Status : In Stock Coupon Code : FREE10
Created at : 08-04-2025
Author : Aston Carter
Updated at : 08-04-2025
Medically Reviewd By : Dr. Peter Hales

Fish Sulfamethoxazole 800mg is a high-strength, pharmaceutical-grade antibiotic designed specifically for use in ornamental and aquarium fish. It is commonly used to treat a wide range of bacterial infections, including internal and external illnesses caused by gram-positive and gram-negative bacteria. This product is ideal for serious aquarists and professionals looking to maintain the health and vitality of their aquatic environment.

What is Sulfamethoxazole?
Sulfamethoxazole is an antibiotic made from sulfonamides that works by stopping bacteria from growing. It is often paired with other antibiotics like trimethoprim to enhance its effectiveness, but it can also be used alone in specific dosing regimens. In fish, Sulfamethoxazole is particularly effective in combating systemic infections that may not respond to surface-level treatments alone.

Commonly Treated Conditions:

  • Fin rot

  • Gill disease

  • Columnaris (Cotton Wool Disease)

  • Septicemia (blood poisoning)

  • Internal bacterial infections

  • Ulcer disease

  • Dropsy

Key Benefits:

  • High potency 800mg tablets for serious infections

  • Targets a wide range of harmful aquatic bacteria

  • Effective for both freshwater and saltwater fish species

  • Suitable for use in hospital tanks or main aquarium systems

  • Can be used in conjunction with other medications (under proper guidance)

Directions for Use:
Dissolve 1 tablet (800mg) per 10 gallons of aquarium water. Treat for 5-7 days. Perform a 25% water change daily, and continue treatment for the full duration even if symptoms begin to improve. Always remove activated carbon or other chemical filtration media during treatment to prevent it from absorbing the medication.

Important Notes:

  • This medication is for aquarium use only and is not intended for human consumption.

  • Not for use on fish intended for human consumption.

  • Store in a cool, dry place, away from sunlight and moisture.

  • Always handle fish medications with clean, dry hands or gloves.

Precautions:

  • Do not overdose. Use only as directed.

  • Ensure proper water parameters and aeration during treatment.

  • Keep out of reach of children and pets.

  • Monitor fish closely during the course of treatment for any signs of distress or adverse reaction.

Why Choose Fish Sulfamethoxazole 800mg?
Maintaining a healthy aquatic ecosystem requires vigilance, care, and the right tools. Fish Sulfamethoxazole 800mg offers trusted, professional-grade treatment for bacterial infections that can otherwise devastate a tank. Whether you're an experienced aquarist or managing a retail aquatic environment, this antibiotic gives you the power to act quickly and effectively when fish health is compromised.

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What is Fish Sulfamethoxazole?

Fish Sulfamethoxazole is an antibiotic containing Sulfamethoxazole 800mg (often combined with Trimethoprim 160mg). It is used to treat a variety of bacterial infections in aquarium fish


What kinds of infections does it treat?

This medication is used to treat: Fin rot Gill disease Pop-eye Columnaris (Flexibacter) Internal bacterial infections Ulcers and open sores


How is it administered to fish?

It is added directly to the aquarium water, or sometimes mixed with food for internal infections. Always follow the product instructions or consult a fish health expert.


What’s the typical dosage?

A common dosage is: One 960mg tablet (800mg SMX + 160mg TMP) per 10 gallons of water, once every 24 hours. Treat for 5–7 days, or as needed depending on severity. Always complete the full course to avoid resistance.


Should I remove carbon from the filter during treatment?

Yes. Activated carbon will absorb the medication, so it should be removed from filters during the treatment period.


Will this harm the beneficial bacteria in the tank?

Yes, it may. Like most antibiotics, Fish Sulfamethoxazole can negatively affect beneficial nitrifying bacteria, potentially causing spikes in ammonia and nitrite. It's recommended to monitor water parameters closely or use a hospital tank.


Can I crush the tablets for better mixing?

Yes. Crushing the tablets before adding them to the tank can help them dissolve more easily, especially in smaller aquariums.


Is this safe for all types of fish?

Most common aquarium species tolerate this well, but sensitive fish or invertebrates (like shrimp and snails) may react negatively. Monitor your fish closely during treatment.


Disclaimer: The content on this page is meant for informational purposes and is not, under any circumstances, supposed to be treated as a substitute for any medical advice, diagnosis, or treatment. For any questions that you may have regarding a medical condition, it is advised to consult your physician or seek help from a qualified health provider before self-medicating. In case you have any concerns regarding the content on our website, please write to us at info@usmedilife.com
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