Yellowing problems at three or four weeks. jack herer

Hey guys. I'm growing jack herer under three one thousand watt hps lights and two 600 hps lights. After the third or fourth week in bloom, the fan leaves start yellowing and fall off eventually. I use ebb and grow with buckets. I use flora series nutes. In my 50 gallon bucket I mix 125 ml of micro, 90 ml of grow, 250 ml of bloom, 200 ml of cal-mag, 200 ml of sweet,50 ml floralicious plus, and 40 liquid kool bloom. My co2 is at around 1500 ppm. The humidity is at around 40, temp at 80. What do you think is wrong guys? I use rockwool by the way. Thanks guys.

wow u got a killer light setup eh haha sry im no help .. lol im guessing u have a sh1tload of plants growing atm ?

Lol. Thanks buddy. I have two more 400 mh for veg. But what good is that when I cant make weight... I have around 35 plants in bloom.

cant make weight ? i thought the more lights (lumens) then the more muthafu<kin dense buds u get ? i only got 1 super lemon haze and 1 the church growing atm under a 400w hps. barely 2 weeks old. goodluck with the 35 plants lol