To use sodium thiosulfate in a fish tank, simply add it to the water at a dose of 1 teaspoon per 10 gallons of water. The sodium thiosulfate will dissolve quickly and begin to work immediately to neutralize chlorine and chloramines. You can test the water after 30 minutes to make sure that all of the chlorine and chloramines have been removed.
Sodium thiosulfate is a safe and effective way to improve water quality in fish tanks. It is also relatively inexpensive, making it a great choice for aquarium owners.