
Fish cephalexin 500mg
Fish Cephalexin 500mg is a broad-spectrum antibiotic used to treat bacterial infections in ornamental fish, including fin rot, skin ulcers, and body slime infections. It belongs to the cephalosporin class and is effective against a wide range of gram-positive bacteria.
PACK SIZE | PRICE | QTY | ADD TO CART | |
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1 Bottle | ($59/Bottle ) |
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3 Bottle | ($58.33/Bottle ) |
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6 Bottle | ($59/Bottle ) |
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SKU : | Status : In Stock | Coupon Code : FREE10 |
Created at : 09-04-2025 Author : Aston Carter |
Updated at : 09-04-2025 Medically Reviewd By : Dr. Peter Hales |
Fish Cephalexin 500mg is a fast-acting, broad-spectrum antibiotic designed to treat bacterial infections in ornamental fish. Cephalexin, a first-generation cephalosporin antibiotic, is especially effective against gram-positive bacteria and is commonly used to treat skin, gill, and internal infections. Whether you’re managing a home aquarium or a professional fish setup, Fish Cephalexin provides trusted, powerful infection control for both freshwater and saltwater environments.
Treats Common Fish Infections Such As:
Fin and tail rot
Bacterial ulcers and abscesses
Gill disease
Pop-eye
Red streaks (signs of septicemia)
Wound infections and open sores
Post-injury or post-surgery bacterial prevention
How It Works:
Cephalexin targets and disrupts bacterial cell wall formation, causing the bacteria to break down and die. This helps your fish recover by eliminating the bacteria causing the infection, while reducing inflammation and promoting healing.
Key Features:
Contains 500mg of Cephalexin per tablet
Targets gram-positive bacterial infections
Works systemically to treat internal and external infections
Safe for freshwater and marine aquarium use
Easy-to-use dissolvable tablet
Ideal for use in quarantine or hospital tanks
Directions for Use:
Add 1 tablet (500mg) per 20 gallons of aquarium water
Dissolve directly into the tank or treatment container
Treat once daily for 5–7 consecutive days
Perform 25% water changes daily during treatment
Remove activated carbon or chemical filtration before and during dosing
Important Precautions:
For aquarium use only – not for human use
Not for use in fish intended for food
Do not overdose or combine with other medications unless advised
Store in a cool, dry place away from light and moisture
Keep out of reach of children and pets
Monitor fish for any signs of stress or reaction during treatment
Why Choose Fish Cephalexin 500mg?
When infection threatens your aquarium, Fish Cephalexin 500mg offers a strong and reliable solution. It’s trusted by aquarists for its quick action, broad effectiveness, and ability to treat even persistent infections. Whether you're treating wounds, preventing infection after injury, or dealing with aggressive bacteria, Fish Cephalexin helps protect your fish and keep your aquatic environment thriving.
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Delivery Time | 7 - 14 Days |
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What is Fish Cephalexin?
Fish Cephalexin 500mg is a broad-spectrum cephalosporin antibiotic used to treat gram-positive bacterial infections in ornamental fish. It interferes with bacterial cell wall formation, causing the bacteria to weaken and die.
What infections does it treat in fish?
Fish Cephalexin is used for: Fin and tail rot Body ulcers and open sores Gill disease Pop-eye (bulging eyes) Bacterial skin infections Red streaks in fins or body (signs of septicemia)
How is it administered in aquariums?
It is usually dissolved directly into the aquarium water. In some cases, it may also be added to medicated food for internal infections, though water treatment is more common.
What is the recommended dosage?
One 500mg capsule per 20 gallons of water Dose once every 24 hours Continue for 5 to 7 days, depending on the severity Perform a 25% water change before each new dose
Should I remove carbon from my filter?
Yes. Remove activated carbon, Purigen, or other chemical media before dosing. These materials absorb medications and will reduce the effectiveness of treatment.
Can I open the capsule for easier dosing?
Yes — you should open the capsule and dissolve the powder into the tank for better distribution and faster absorption.
Is it safe for all fish?
Scaleless fish (loaches, corydoras, catfish) Invertebrates like shrimp and snails (may be affected)
Will it harm beneficial bacteria in the tank?
Possibly. Cephalexin can disrupt your biological filtration, so it’s ideal to treat in a separate hospital tank when possible. If treating in the main tank, test your ammonia/nitrite levels daily.
Can it be combined with other medications?
Avoid combining Fish Cephalexin with other antibiotics unless you're experienced or guided by an aquatic veterinarian. Improper combinations can cause stress or reduce the effectiveness of both drugs.
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