Malachite Green + Formalin (Ich Treatment)
Malachite green oxalate + Formalin
Drug Class
Antiparasitic
Available Forms
Liquid (added to aquarium water)
Approved For
Dosage Guide
Follow product-specific instructions. Typically 1 drop per gallon daily with 25% water change before each dose. Treat for 10-14 days minimum. Remove activated carbon during treatment.
This is a general reference only. Always follow your veterinarian's prescribed dosage for your specific pet.
Side Effects
- •Toxic to fish at high doses
- •May reduce dissolved oxygen — increase aeration during treatment
- •Toxic to invertebrates (shrimp, snails)
- •Stains silicone and decorations
Important Warnings
- !Scale-less fish (loaches, catfish, tetras) are sensitive — use half dose
- !Remove activated carbon from filter before treatment
- !Increase aeration during treatment
- !Carcinogenic with prolonged human exposure — handle with gloves
- !NOT for use in food fish
- !Not all white spots are ich — confirm diagnosis before treating
Contraindications
Do not use this medication in the following situations:
- ✕Tanks containing invertebrates (shrimp, snails)
- ✕Certain sensitive species (check species compatibility)
Medical Disclaimer
This medication guide is for informational purposes only. Always consult a licensed veterinarian before administering any medication to your pet. Dosages vary based on weight, age, health status, and concurrent medications. Never give human medications to pets without veterinary approval — many common human drugs are toxic or fatal to animals.