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| Active Ingredients | Methylene Blue |
| Treats | Fungal infections (egg fungus), ammonia poisoning, transit shock |
| Use In | Hospital tank, transit dip |
| Reef Safe | No |
Methylene blue does two things at once: it carries oxygen for fish in distress (ammonia poisoning, gill damage, transport shock) and acts as a mild antifungal for egg and external infections. The blue dye binds methemoglobin back to functional hemoglobin — the chemistry behind why a fish gasping at the surface goes back to normal breathing within minutes of a methylene blue bath. Every FisHotel intake bag gets a methylene blue dip before the fish even sees a quarantine tank.
Active ingredient: methylene blue. Used as a short bath for shock or ammonia, or at a much lower dose in display tanks for egg fungus. Stains everything it touches blue, including silicone tank seals — accept it. For exact dosing per gallon, see the Misc tab on our Medication Dosing Calculator.
Treats: ammonia poisoning, methemoglobinemia, transport shock, egg fungus (Saprolegnia), mild external fungal and bacterial infections.
Use in: quarantine, hospital tank, or transport buckets — short bath only in display.
Reef safe: at low dose for a short period, yes — but stains everything blue.
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All medications sold by FisHotel are intended exclusively for ornamental aquarium fish. They are not for human consumption, not for food-producing animals, and not for use in any tank stocked with fish intended for human consumption. By proceeding, you acknowledge that you are purchasing these medications for ornamental aquarium use only, that you understand proper dosing and handling, and that you accept full responsibility for safe application.
