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Sera Marin Component 4 Trace Elements Kationics 250 Ml
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In combination with sera marin 3 it optimizes the supply of corals and other invertebrates with trace elements. Recommended dosage Use the cap as a measure. Add once weekly one capful each of sera marin 3 and 4 for every 100 liters (26.4 US gal.) of aquarium water after having adjusted the Calcium level with sera marin 1 and 2.