API Pimafix is an over-the-counter aquarium treatment derived from an extract of the West Indian Bay Tree (Pimenta racemosa). It is marketed as an antifungal and mild antibacterial treatment for freshwater and marine fish and is often used in combination with its sister product Melafix (Melaleuca extract). Pimafix is considered a gentle, supportive treatment rather than a strong medication — it is useful for mild fungal infections, body slime disease, and early bacterial or fungal issues, but it should not be relied upon for serious disease. As a botanical aquarium product, Pimafix is not a prescription-grade veterinary medication. For valuable fish or serious infections, consult an aquatic veterinarian.
Overview
Pimafix contains essential oils from the West Indian Bay Tree, which have mild antimicrobial activity. Its primary use is for fungal infections on fish and fin damage, and it is often used preventively after treating more serious disease or during quarantine. Pimafix is intended for freshwater and marine aquariums at standard dose and is generally considered gentle to most fish and invertebrates, though it should be used with caution around labyrinth fish such as bettas and gouramis.
Uses
- Mild fungal infections on fish
- Supportive treatment during bacterial infection
- Fin and body slime disease
- Prevention of secondary fungal infection following injury or parasite damage
- Quarantine support for new fish
Dosage
- Standard dose: 5 mL (1 teaspoon) per 10 gallons daily for 7 days
- Water change: Perform a 25% water change after 7 days of treatment
- Can be repeated if necessary
Always follow the product label for exact dosing.
Safety Considerations
- Labyrinth fish — Bettas, gouramis, and other anabantoids breathe air from the surface. Some reports suggest Pimafix and Melafix may form a film on the water surface that interferes with breathing. Ensure good surface agitation and monitor closely.
- Invertebrates — Generally considered safe for shrimp, snails, and corals at label dose, but individual sensitivity varies
- Scaleless fish — Generally well-tolerated
- Plants — Generally safe for live plants
- Effectiveness limits — Pimafix is mild. Do not rely on it for serious bacterial or fungal infection.
- Oxygenation — May cause foaming or slight surface film. Maintain good surface agitation.
- User safety — Wash hands after handling; has a strong herbal scent
Water Chemistry Effects
- Minimal effect on pH, hardness, or salinity
- May cause mild foaming or surface film that can interfere with gas exchange
- Does not significantly affect nitrifying filter bacteria
- Activated carbon removes it after treatment
How to Use
- Test water and address any poor parameters first
- Remove activated carbon from the filter
- Shake the bottle well
- Dose the recommended amount per gallon
- Increase surface agitation if the tank contains labyrinth fish
- Treat daily for 7 days
- Perform a 25% water change after treatment and return activated carbon
- Repeat course if needed
FAQs
Is Pimafix reef-safe? It is generally considered safe for reef tanks at label dose, though individual coral and invertebrate sensitivity varies.
Can I use it with Melafix? Yes, API specifically markets them as a complementary combination for fungal and bacterial infection support.
Is it effective for severe infections? No. Pimafix is mild. For serious disease, use stronger medications under veterinary guidance.
Is it safe for bettas? With caution. Ensure strong surface agitation to prevent oily film from interfering with surface breathing.
Will it affect my biological filter? No, it is generally gentle on nitrifying bacteria.
How does it compare to Methylene Blue? Methylene blue is more effective but stains everything; Pimafix is gentler and suitable for display tanks.