As Robert has stated, your pH levels are too high. You are experiencing what in the horticulture industries is called acid lock. Many people keep adding nutrients to try to recover the plant that is exhibiting signs of nutrient deficiencies. inexperienced grower add more and more nutrients and nothing helps. They finally ask an established grower for help to solve this problem, and the answer is check your pH. The pH is checked, and the grower is told add lime to lower the pH. The pH gets back in the range that it should be, and the plant deteriorates extremely fast.
That is because now that the pH is right the soil has enough nutrient in it to grow a redwood tree in 4 hours.
The best way to handle this is to flush the pants as much as possible. It is time consuming, but the only way to salvage the plants.
I take the plants in their container and slowly submerge the plant in a water bath that as close to 7.0 pH. and let them sit for about 20 minutes. I will then take the plant out of the flushing container, then take a reading of the flush solution in ppm. Repeat this until your ppm reading is under 1600.Then I will flush in a solution that has been taken down to a pH of 6.5. Repeat the process, If your ppm stay under 1600, bring the flushing solution to a pH of 6.0. Again repeat until you get ppm readings under 1600.
The best case scenario is to be able to completely flush the plants until the ppm is 0. That is just not that easy to do. At 1600 ppm you are at least at a level that will not burn your plants. The down side is there is no way to determine what the composition of the 1600 ppm are. Could be all Nitrogen, of all Phosphorus.
Once you have to do this to save your plants, you will realize how easy and important it is to check soil pH and ppm.