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Rating: 4.5

Average rating from 2 reviews.

(4.5 out of 5, based on 2 reviews)

Methylene Blue by Kordon is an effective treatment for superficial fungus infections. It is safe to use preventatively for fish eggs. It is non-toxic when used as directed, per label instructions.
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Reader's Reviews (2)
Valarie B.
Rating: 4

Good product

posted 6 years ago

I use the methyline in my tanks to combat fin rot and have good results. The only problem I see is the staining it can cause to your tank and decorations

Pros: works well

Cons: stains

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Rating: 5

Good product

posted 7 years ago

I have used methylene blue for several years. I add it to my prophylactic freshwater baths (for my saltwater fish). It aids in parasite removal and oxygenation.

Gloves should be worn as it will stain skin, clothes, silicone,etc.

Pros: aids in oxygenation

Cons: can be toxic; stains

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