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Methylene Blue

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$9.99
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  • Prevents fungal infections on fish eggs
  • Treats nitrite and cyanide poisoning in fish
  • Treats fungus and external protozoan parasites on fish

Methylene blue is commonly used by fish breeders to prevent and treat fungal infections on fish eggs, as well as treat fish with cyanide and nitrite poisoning. As a secondary use case, it can help treat superficial fungus and some external protozoan parasites on fish. The disease symptoms can include white tufts or strands on the body (fungus) and scratching on the tank bottom or objects (external parasites).

Royal Medicine Methylene Blue

Treat Egg Fungus

A Little Goes A Long Way

small_meth_blue_catch_cup_corydoras_eggs
Aquarium Co-Op Breeding Supplies Aquarium Co-Op Unbreakable Catch Cup

Improve Your Hatch Rate

Customer Reviews

Based on 24 reviews
92%
(22)
8%
(2)
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(0)
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S
Steele H. (Fond du Lac, WI, US)

Methylene Blue

S
Scott A. (Nampa, ID, US)
Methylene Blue for fry

Use a couple of drops of Methylene Blue in fry-rearing tanks. Works well. Never have any trouble with bacterial growth.

K
Kevin M. (Union Dale, PA, US)

No fungus, must have worked

S
Susan S.
Pretty sure this product is great

I have not used this product yet. I’m sure it’s great but I’m glad I have not had the opportunity to use it yet.

E
Emily R. (Frisco, TX, US)
Excellent for Preventing Fungus On Eggs

Relatively hard to find and works super well. Definitely recommend if you plan on breeding fish.