Coral Essentials Coral Power Selenium is a microelement that should only be strictly used in conjunction with a reputable ICP analysis company. Selenium is an essential trace element for the health and development of corals, particularly SPS corals. It plays a role in protecting corals from oxidative damage and supporting their nutrition. While crucial in small amounts, selenium can be toxic at higher concentrations, so it’s important to monitor levels in a saltwater aquarium and ensure proper dosing. Only with consistent ICP analysis can you feel confident your corals are receiving absolutely every micro element that they would in the wild.
Dosing requirements: Shake well before use. 1 drop / 100L of tank water only after ICP results have arrived.For the advanced aquarist: 1ml (20 drops) will raise the selenium levels by 0.05 ppm (mg/L) for each 100L of tank water. If  you know the lithium depletion rate then dose accordingly.Size: 50mL