Not the writer of this article.
Methylene Blue( zinc free ) 100% Can be used to increase oxygen in water. But other then that it has been prove to be of little value in fish tanks. Dosage: 24 grams makes 1 pint. Then use 1 drop per gallon of water. (Don't expect much form this chemical and you won't be disappointed)
Methylene Blue( zinc free ) 100% Can be used to increase oxygen in water. But other then that it has been prove to be of little value in fish tanks. Dosage: 24 grams makes 1 pint. Then use 1 drop per gallon of water. (Don't expect much form this chemical and you won't be disappointed)