false.
Melafix (a proprietary name) is an all-natural
aquarium antibiotic consisting of an
essential oil from a tree in the
Melaleuca genus. Contrary to popular opinion it is not made from the common
Tea tree,
Melaleuca alternifolia, but from
Melaleuca leucadendra, also known as the
Cajeput Tree. This is confirmed by the manufacturer's Safety Data Sheet.
[1]
It is a wide-range antibiotic product, and thus is effective for a wide variety of mild gram positive bacterial infections, such as
fin rot. However, it is generally ineffective against aquatic
parasites and is typically used for treating the wounds caused by them in order to prevent secondary infection by other microorganisms.
[2]