Exotic Genetix Chromatose in Living Soil

So I killed the middle plant since it was past the point of saving. I am guessing that it either had some bad nutrient lockout, or somehow that plant was hungry for a certain nutrient? Calcium, magnesium, phosphorus are my guesses, but I dont understand why only the middle plant started showing sings so quickly. Either way it happened very suddenly and I was not able to help it in time with any amendments. Now what I was worried about is happening. The other plants are showing the same signs. Not as drastically but I dont want to lose all 3 plants! I am going to buy some epsom salts and phosphorus amendments and see what I can do.