deficiencies in k mg wree corrected by ponds supplementation of fertilizers containing sources of k and mg , including muriate of potash (potassium chloride;50%k) and (potassium magnesium sulfate, 17.8% k and 10.5%mg) ionic concentratios in individual of ionsevery year prior to stocking . following application of fertilizers,levels of k and mg are lost due to soil uptake, shrimp harvest, draining at harvest, or overflow