Coco coir grow pH issue, intake of nutrients

Hi lanchita.... unfortunatly if you watered with a 5 ph you surely increased issues..... you will find here growdiaries.com/diaries/28932-let-mother-nature-do-the-job-1st-part/week/138596 a pic with proper range of pH for coco/soil for nutrients availablity 👍 you will need it to properly correct your problem in other hand i think that you are in a combo for few plants.... big N deficiency big Fe deficicency (chlorosis) at least may be some other (magnesium )! ur kush seems to be overwatered in addition. a question : is your pH metter need a calibration or a re-calibration sometimes ? many needs that... if yes proceed to the calibration before a new watering 👍 adding some benificials with innoculation technics could be a great help for the futur weeks cause they acts as a bio regulator (and as a bio fertilizer) in order to break lock out nutes processes ... add tricho and mychrizzae + bacterias will be very useful...even if they took around a week to start to be fully effective..... in the second week in my diary i explain a bit how they works....feel free to take a look growdiaries.com/diaries/28932-let-mother-nature-do-the-job-1st-part/week/140117 spraying a solution with Fe and N could aslo be a good solution for to help plant for a faster and better recovering....use distilled water if you spray. for your plant in veg don't worry. they will recovering soon if u keep the good pH range....for the tangie auto it s a bit late try to add pk at 6.5 pH and see if it improves things 😓 hope this helps....good luck for your grow