sweet mix auto in mini grow led

Hi everyone, I'm a minigrow enthusiast, this is my new self-built box. It measures 70x36x67h cm, it is illuminated by 2 65w LED plates taken from Aliexpress. for now I have only given a little ammonium sulphate immediately after the transplant which took place a week ago. I'm used to looking after only one plant at a time in my old box, this is the third time I'll have to deal with multiple plants, I hope to harvest at least 80g.