Selenium (Se) in seawater plays significant roles in the physiology and ecology of marine organisms like algae, corals, and microbes.

As per Reef Zlements mixing classification Selenium is a Type A element.

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

1 ml of Reef Zlements Selenium increases the Selenium concentration of 100 litres of water by 2 μg/l.

150ml bottle