Farmer initially began raising shrimp utiizing low salinity artesian well well water in Alabama in 1999. Intnitial efforts resulted in high mortality and poor growth of( post-larval and Juvenile shrimp.). Further investigation revealed deficiencies in potassium (K) and magnesium (Mg) in inland LSW utilized for shrimp cultre (Saoud et al. 2003; Davis, Saoud Boyd and Rouse 2005; Roy et al. 2007).These variations in pond K and Mg levels have resulted in large variations in survival and growth in shrimp raised in different ponds on the same farm (Roy et al. 2009a). Deficiencies in K and Mg were corrected by pond supplementation of fertilizers containing sources of K and Mg including muriate of potash (potassium chloride; 50%K) and K-Mag (Potassium magnesium sulfate, 17.8% K and 10.5% Mg )(McNevin et al.2004). Ionic concentrations in individual ponds can vary from year to year (Table 1), resulting in the need to evaluate pond levels of ioms every year prior to stocking. Following application of fertilizers,levels of K and Mg are lost due to soil uptake, shrimp harvest, draining at harvest, seepage, or overflow (Boyd, Boyd and Rouse 2007a). Throughout the production cycle, large amounts of K and Mg are lost to soil adsorption (Boyd et al.2007a; Boyd and Rouse 2007b;Pine 2008) and as a precaution Alabama farmers have ion levels checked once or twice during the production cycle to make sure levels of K and Mg are maintained at high enough concentrations to allow for adequate growth and survival of L.vannamei. Fortification of water with K has also been advantageous with a number of other species of shrimp and fish cultured in low salinity environments (Forsberg and Neil 1997; Fielder, and Allen 2001; Prangnell and Fotedar 2006; Partridge and Lymberry 2008; Partridge,Lymbery and George 2008).