From Humblefish's treatment advisory:
Methylene Blue: Treats ammonia burn/exposure, cuts, injuries. Will possibly detoxify a fish that has been exposed to cyanide poisoning.
How To Treat - Comes in both liquid and powder form, sometimes mixed in with another medication. So, follow the directions on the label. Generally used as a 30 minute bath/dip at double dose, but you can also dose it directly into a quarantine tank. Aerate heavily. You can combine M Blue with nitrofurazone (active ingredient found in Furan-2) if needing to treat for a bacterial infection. In fact, Nitrofuracin Green Powder contains both medications and is great for treating open wounds or sores.
Methylene Blue: Treats ammonia burn/exposure, cuts, injuries. Will possibly detoxify a fish that has been exposed to cyanide poisoning.
How To Treat - Comes in both liquid and powder form, sometimes mixed in with another medication. So, follow the directions on the label. Generally used as a 30 minute bath/dip at double dose, but you can also dose it directly into a quarantine tank. Aerate heavily. You can combine M Blue with nitrofurazone (active ingredient found in Furan-2) if needing to treat for a bacterial infection. In fact, Nitrofuracin Green Powder contains both medications and is great for treating open wounds or sores.

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