Hi there, yes you got an nutrient burn lady.. good that you already flushed👍.. the tips of the leaves will not turn green again all though you are making sure they don't turn more brown/yellow with the flushing.. try to half the dosage (or even less) nutrients you gave them before. And build up from there if you feel like they are picking up and looking very healthy again.. They will have enough food storage in the leaves for a while (so much it burnt the tips;)). So possible you don't need to give much more than half a dosage you gave before till the end👍