Leaves dying

During the 5th week (since germination) until now (the 6th) my plant leaves have started to die... they started to turn yellow (it looked like they had low N) but now besides that they also show some dark areas.

As I dont have the pictures here, please look at them in my diarry here https://www.rollitup.org/t/first-grow-ever-automatics-indoors.851705/

I'm using All-mix soil (biobizz) and I started giving biogrow (biobizz) in the 4rth week... about 0,5ml for 1,5L of whater first and then raised to 1ml for 1,5ml of water.

I always gave bottled water, in the label says ph is 6,6.

Looking at the pictures, is it overfeed or lack of nutrients?

Its an auto from what I read. I looked at the very last picture on your link. Its getting closer to being done and it looks like you've cut the Nitrogen out of its diet and gave it straight bloom foods? Its normally what happens when the plant is finishing up, using the stored energy in the leaves to finish flowering. If you want you can give it a small dose of nitrogen now or just let it go, its fine. Don't listen to that flowering nute bullshit. Give your plant/plants and balanced feed throughout their life. You can cut down a little on the Nitrogen later into flower but don't cut it out completely. Yellow leaves are non-productive leaves. Nice Buds and Good Luck.

actually I have 2 plants, both shoing the same symptoms. Both automatic.
I didnt cut in anything... but I did water too litle... the soil did became too hard and the water could hardly penetrate on it... meanwhile I've solved that.

Today i've flushed them with 1,5L of water each after reading some other advice in my diary thread, the leaves in a claw shape mean an excess on N... so I played safe and flushed.

The darker spots I still dont know what they mean.. so I'm not sure if I should give them bio-bloom and top max or not