Collection: Trace Elements

Minor-element supplements from Seachem for reef aquariums. Reef Trace combines several trace elements in one bottle, offered in 500 mL and 2 liter sizes. Reef Potassium is a single-element potassium supplement, and Reef Iron is used mostly to feed macroalgae in a refugium. Water changes restore part of what is consumed, so let test results decide how much and how often to dose.