Wedding cheesecake and gorilla cookies

week 7 I am having a troublesome time. I am feeding a litre a week per plant with nutes and a litre water 2 days after so 2 feeds a week to each plant I give 8ml sensi bloom part a and 8 ml part b to 1 gallon dechlorinated and ph at 6 water with 4ml carbo load 4ml sensizyme and 4ml overdrive and also some calmag in between feeds! I will carry on as I am but I need help! I don’t know why the fan leaves are browning and yellowing I have trimmed the plants of most dead/dying foliage after giving a feed and adding calmag I hope they will pick back up! I have added all photos from last update in order to date