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Fish Mox

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Fish Mox (Amoxicillin) 250 mg, 100 Capsules
Price: $19.92
Item #: 1013959 -
Availability: In Stock
Fish Mox (Amoxicillin) 250 mg, 30 Capsules
Price: $13.62
Item #: 1013958 -
Availability: In Stock
Fish Mox Forte (Amoxicillin) - 500 mg 100 Capsules
Price: $29.92
Item #: 1014042 -
Availability: In Stock
Fish Mox Forte (Amoxicillin) 500 mg, 30 Capsules
Price: $23.48
Item #: 1013960 -
Availability: In Stock

Products 1-4 of 4

Amoxicillin Fish Antibiotics

Fish Mox and Fish Mox Forte are antibiotics for fish with amoxicillin. Fish Mox pet medications are effective against gram positive and gram negative bacteria and are used to control common bacterial fish diseases like aeromonas and chondroccus. Each Fish Mox capsule contains 250 mg of amoxicillin, while Fish Mox Forte contains 500 mg amoxicillin.

Fish Mox is an antibiotic effective against a broad range of gram-positive and gram-negative bacteria. Use of Fish Mox clears up a variety of infections and prevents complications. Fish Mox is sometimes given to treat infections in dogs and cats and may be used off-label to treat infections in small animals.

Benefits of Fish Mox:

  • Works against a variety of infections, including skin and urinary tract
  • Especially effective against gram-positive infections
  • Usually well tolerated
  • Available in regular and extra strength
  • Protects your pet's health
  • Just one capsule per day treats a 10-gallon aquarium
  • Available in two strengths for ease of dosing: 250 mg and 500 mg
  • For use in fish, cats, and dogs
  • Does not usually cause adverse effects

For Use In: Ornamental and aquarium fish only. Fish Mox may also be used in dogs and cats.

Use only as directed. Do not allow children to administer Fish Mox.

The recommended dose of Fish Mox depends on the location of infection and susceptibility of bacteria. Consult your veterinarian for specific dosing information.

Directions for Fish:

  1. Add one capsule of Fish Mox into the aquarium water. Use one 250 mg capsule per 10 gallons of water or one 500 mg capsule per 20 gallons of water.
  2. Repeat treatment in 24 hours. You can make a partial water change between doses.
  3. Repeat daily treatments for 5 to 10 days, or for the period of time specified by your veterinarian. Discontinue if no improvement is noticeable after 5 days.

Directions for Dogs and Cats:

  1. Administer 3-9 mg per pound of body weight every 8 to 12 hours.
  2. Consult your veterinarian for exact dosing.
  3. Discontinue if symptoms of an allergic reaction occur.


Store Fish Mox at room temperature. Keep away from light, moisture, and heat. Keep out of reach of children and pets. 

It is a violation of Federal Law to use this product in a manner inconsistent with its labeling.

Fish Mox fights off bacterial infections in fish and other animals that would cause harm if left untreated. Fish Mox works to treat and prevent infections in fish and other animals by exerting an anti-bacterial action on gram-positive bacteria. Fish Mox is also effective against some gram-negative bacteria.


Keep this product out of reach of children and animals. Do not use or store in or near open flame or heat.

Fish Mox is intended for ornamental and aquarium fish only. Fish Mox may also be used in dogs and cats. Do not give Fish Mox to humans.

CAUTION: Allergic reactions to Fish Mox are possible and the development of such reactions requires discontinuation of the medication. Use with caution in animals with allergies to penicillin-like medications.

Oral doses commonly cause vomiting and/or diarrhea.

Consult your doctor before giving Fish Mox to dogs, cats, or other animals that are being treated with other prescription or over-the-counter medications. The antibiotics chloramphenicol and tetracycline, for example, may interact with amoxicillin.