Strange leaf discoloration

[Greenthumbgrower1986]

Hi all, yet again I'm experiencing more issues. Got some autos in a tent whilst I'm vegging out some photos. Both tents are next to each other, the photo period plants seem absolutely fine, it's the autos that have developed some kind of discoloration on its leaves. They are on day 15 in biobizz lightmix. They are fed with ro water and calmag to take the water up to 150ppm, I then add 0.5 ml (per litre) of bac nutrients grow which takes water to 250ppm. I then pH to 6.4. first 2 photos are the auto flowers, the small pots are the photoperiod

 

[Greenthumbgrower1986]

Also the tips of newer growth is flipping over.

 

[hotrodharley]

Why are you feeding?

 

[Greenthumbgrower1986]

Why are you feeding?

I was told by the nutrient company to start feed at quarter strength from week 2

 

[hotrodharley]

We generally don’t feed until around week 3 unless it’s in coco or another inert substrate. Autos are not the easiest to feed. Just keep going. Bet your problem starts to disappear as roots grow out.

 

[Greenthumbgrower1986]

We generally don’t feed until around week 3 unless it’s in coco or another inert substrate. Autos are not the easiest to feed. Just keep going. Bet your problem starts to disappear as roots grow out.

So would you recommend just ro water with calmag for now

 

[hotrodharley]

So would you recommend just ro water with calmag for now

At this point just keep doing what you are doing. Dropping EC is not a good idea when it’s this low already. They’ll adjust.