Seachem Flourish Trace supplies a broad range of trace elements demonstrated to be necessary for proper plant health and growth (see below for signs of deficiencies). 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. Seachem Flourish Trace may be used alone or in conjunction with Flourish. Best results are obtained when both are used. Seachem Flourish Trace is safe for invertebrates such as shrimp.Signs of Trace Element Deficiencies:Boron: Death of stem and root apical meristem, leaves twisted, young tissue most affectedCobalt: used for nitrogen fixation, same as nitrogen deficiency signs (stunted growth)Copper: Young leaves dark green, twisted, wilted, tip remains aliveManganese: Chlorosis of young leaves, with smallest veins remaining green, necrosis between veinsMolybdenum: Chlorosis, twisting, death of youn