what i am seeing is poor ph. again ph should be 6.3 i see a ph issue that is way out of line, your plants are suffering and no matter how or who answers the questions there still seems the plants suffer.
your pink tips are most likely part of the strain, but since the stress of the ph, your starting to get a lock out and at a young age.
pretty sad really considering the plants usually grow much better if you just let them be, instead i see over watering, the wrong ph level for your grow medium, as well as a high acid soil.
your roots are very unhappy and this shows in your grow.
what i suggest is stop asking for advice and picking the wrong answer which in turn puts your plants in a danger zone.
so here is my suggestion to you since you do not listen to advice given by growers on this forum.
pick up a book about growing, or you can do an internet search on how to grow cannabis, i know there is a free on ilgm that you can down load for free and i am very sure that once you read the info on growing,
you should understand the plant and the needs of the plant.
understanding the plants function during a grow is a very important issue. you as a grower only wants the instant answers but ignore the answers. yes i could tell you how to fix this mess but i do not think i want a hand fixing your grow when you do not listen. so happy growing and i hope for the plants sake you figure things out