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Fish Mox 250 mg 30 Capsules

$33.99 $43.99

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Check Mark Notice: Dog antibiotics sold out. Fish antibiotics (same grade & content) in stock — select “Fish” in variations to order.

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Fish Mox (Amoxicillin) 250mg – 30 Capsules

Trusted Aquarium Antibiotic for Bacterial Infections

Fish Mox (Amoxicillin) 250mg is a reliable, fast-acting antibiotic designed to treat common bacterial infections in ornamental aquarium fish. This lower-strength formula is ideal for sensitive fish or smaller tanks, effectively treating conditions like fin rot, skin ulcers, and gill infections. With easy dissolution and quick action, Fish Mox helps restore aquatic health safely and efficiently.

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Key Benefits of Fish Mox 250mg Capsules

  • Powerful Antibacterial Action: Eliminates a broad range of gram-positive and gram-negative bacteria.
  • Gentle Strength: Ideal for use in smaller tanks or with more delicate fish species.
  • Fast-Dissolving Formula: Dissolves evenly in aquarium water for optimal distribution and quick absorption.
  • Dual-Purpose Treatment: Effective against both internal and external bacterial infections.
  • Protects Entire Tank: Stops bacteria from spreading to other fish or becoming systemic.

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When Should You Use Fish Mox Amoxicillin 250mg?

Fish Mox should be used at the first signs of bacterial infection. Watch for symptoms such as:

  • Sluggish movement or inactivity
  • Red streaks or inflamed fins
  • Open sores or body lesions
  • Swollen eyes (pop-eye)
  • Bloated or distended abdomen

Be sure the condition is bacterial, not parasitic or fungal, before starting treatment.

Directions for Use

  • Dosage: Add one 250mg capsule per 20 gallons of aquarium water.
  • Repeat: Dose once every 24 hours.
  • Duration: Minimum of 5 days, maximum of 10 days.
  • Water Change: Perform partial water changes daily between treatments. Use activated carbon after the final dose to remove residual medication.

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Active Ingredient

Amoxicillin 250mg – A time-tested penicillin-type antibiotic that halts bacterial growth by targeting cell wall production.

Storage Instructions

Keep tightly sealed in a cool, dry place between 59°F–86°F (15°C–30°C). Avoid heat and humidity.

Precautions & Side Effects

  • Only for use in ornamental fish aquariums.
  • Do not use in tanks with fish intended for human consumption.
  • Keep out of reach of children and household pets.
  • Overuse may impact the tank's beneficial bacteria—use probiotics if needed post-treatment.

For return concerns, refer to our Refund Policy.

FAQs – Fish Mox (Amoxicillin) 250mg

  • What does Fish Mox 250mg treat?
    This formulation treats fin rot, ulcers, gill disease, red streaks, dropsy, and other bacterial infections in freshwater and marine fish.
  • Is it safe in saltwater tanks?
    Yes, Fish Mox 250mg is suitable for both freshwater and saltwater aquariums.
  • Will it harm beneficial bacteria?
    It may have a minor effect. Consider adding a probiotic after the treatment cycle ends.
  • Can I use it with shrimp or snails?
    Fish Mox is not formulated for invertebrates. Consult a vet before use in tanks with sensitive species.
  • How do I prepare the tank?
    Remove carbon filters and perform a partial water change before adding the first dose.
  • Is it safe for fry or juvenile fish?
    Yes, but ensure careful dosing and monitor closely for any signs of stress.
  • What if there's no improvement after 5 days?
    Stop use and consult an aquatic vet to evaluate alternative options.
  • Can I mix Fish Mox with other meds?
    Not recommended unless under direct veterinary guidance.
  • Does water temperature affect the treatment?
    Yes, stable temperature helps the medication work more effectively. Keep the tank at ideal conditions for your fish species.
  • How do I dispose of unused capsules?
    Do not flush. Dispose of them according to local hazardous waste guidelines.

Need effective fish antibiotics without a vet prescription? Visit DogsAntibiotics.com for reliable solutions and fast shipping across the U.S.

Your order of 100$ or more gets free standard delivery.

  • Standard delivered 4-5 Business Days
  • Express delivered 2-4 Business Days

Orders are processed and delivered Monday-Friday (excluding public holidays)


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