
Kordon Methylene Blue is a trusted, go-to medicine for preventing fungal and bacterial infections in aquarium and pond fish, especially for targeted treatments like egg incubation, fin rot, and minor diseases. However, be prepared to isolate fish in a separate container since it stains tank silicone and can disrupt beneficial bacteria if used in the main aquarium. If you want a versatile, reliable treatment thatβs safe for fish but requires careful application, this is a solid choice. For continuous aquarium treatment without staining concerns, you might want to look into alternative broad-spectrum aquarium medications.
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