Bromine (Br) in seawater exists primarily in the form of bromide ions (Br-); however, under certain conditions, bromide can be oxidised to form other bromine species, such as hypobromous acid (HOBr) and bromine gas (Br2). These species can further react with organic and inorganic compounds, influencing the chemical composition of seawater.

Bromine is essential for forming certain biochemical compounds in marine organisms, including corals. It is involved in synthesising halogenated organic compounds, which can serve various biological functions, including defence mechanisms and metabolic processes.


As per Reef Zlements mixing classification Bromine is a Type C element.

For more scientifically proven information regarding Bromine, please refer to our comprehensive H2P Methodology manual, which you can find at the link below.

10 ml of Bromine Zlement increases the Bromine concentration of 100 litres by 5 mg/l.​

Available size: 1 Litre Bottle

IMPORTANT NOTE: The use of Ozone and the dosing of Bromine should be handled with care, as both substances together may lead to the formation of Bromate a toxic compound. Therefore the ozonised water should be passed through an activated carbon filter.