Foliar feeding is great for assisting with deficiencies, but not so much with curing them. In addition fo foliar feeding now, you need to use a product like Botanicare's CalMag or Technaflora's MagiCal to add those two into the nutrient solution.

Is there anyway to use tap or well water instead of the distilled? Tap or well water should have the two in it.

Epsom salts is great when diluted and applied to the foliage for Mg, but not Ca.