Check the listing for details. Seachem Reef Trace 250mL Trace Element Supplement for Live Coral Reef Aquariums. Condition: New. Listed at 13.99 USD. Seachem Reef Trace 250mLSupplies a broad range of trace elements.Reef Trace may be used alone or in conjunction with Reef Plus.Reef Trace is nitrate/phosphate free. Overview:Replenishment of a number of trace elements is required to maintain an environment ideal for the growth and reproduction of marine life, but while the importance of trace elements has been recognized by aquarists for many years, the physiological reasons are not fully understood. The chemical elements in seawater are varied, and, likewise their addition to the aquarium in trace quantities has varied effects on a variety of saltwater plant and invertebrate species. In general, though, these elements are important for metabolic processes and pigment formation.Reef Trace supplies a broad range of trace elements demonstrated to be necessary for proper reef health and growth. Trace elements are normally depleted by utilization, oxidation and precipitation. The latter two processes occur more rapidly than with other micronutrients. This makes it important to restore trace elements on a regular basis. Reef Trace may be used alone or in conjunction with Reef Plus. Best results are obtained when both are used. Reef Trace is nitrate/phosphate free.Directions:Use 1 capful (5 mL) for every 80 L (20 US gallons) twice a week. When using in conjunction with Reef Plus, dose on alternate days.Ingredients:copper sulfate, cobalt sulfate, manganese sulfate, boric acid, sodium molybdate, zinc sulfate, rubidium chloride, nickel chloride, vanadium sulfate.Size: 250 mL