King British Methylene Blue is a longstanding treatment for aquaria, used by generations of fish keepers.

It is effective against a range of fungal & bacterial infections.

For use in coldwater & tropical aquariums.


100ml bottle will treat up to 900 litres of tank water.

Active Ingredient: Contains: Methylene Blue 2.44% w/w.

King British Methylene Blue Antseptic Treatment

SKU: 5017357022109