Why the yellowing

[Newgrow31]

So I forgot to water the gals, so a day late I did so as they where wilted and looking rather sad So 2 liters each, later that day they picked up and lift all the fans to the light but 2day 24h later I have some yellowing on the big fan leaves on 1 plant only can any 1 help, a bit about the set up

day 30 of flower
Unknown strain clone (pritty sure its a haze)
20l plastic pots
BioBizz all mix
Bio bizz bloom every feed when dry up to second knuckle
No training
600w hps

 

[Newgrow31]

Some better pics

 

[Mañ'O'Green]

You may have just stressed the heck out of them with the watering problem but the white dots on the leaves are concerning. Turn the leaves over and look for insects with a strong magnifier.

 

[Newgrow31]

Nothing on the underside of the fans I thought the same think it was dust as I moved a fan.

Will the leaves go back green then if its stress
Any opinion on the overall plants??

 

[BII]

To me (definitely not an expert), I don't really see a problem. Only a few old lower fan leaves look to be yellowing, with new growth looking OK. The yellowed leaves are low, rather well hidden/covered (look at the last picture), and thus will likely die or be plucked (defoliated) sooner or later. Be concerned if the problem spreads.

I suggest tell us more, particularly about your feeding regimen, so any problems can be identified now.

 

[Newgrow31]

To me (definitely not an expert), I don't really see a problem. Only a few old lower fan leaves look to be yellowing, with new growth looking OK. The yellowed leaves are low, rather well hidden/covered (look at the last picture), and thus will likely die or be plucked (defoliated) sooner or later. Be concerned if the problem spreads.

I suggest tell us more, particularly about your feeding regimen, so any problems can be identified now.

Not a massive lot to tell bio biz bloom 4ml per liter every feed
I feed about about 1.5 l when top of soil is dry that's it
Iv never bothered with pHing I checked my tap water and it's at 6.6 but it's left out to air

 

[Proph]

This type of yellowing is called cannibalism. The plant is feeding off of the nutrients stored in those yellowing leaves. There could be several causes for that. In your case, I think you are waiting too long to water/feed. The damaged leaves will never gain their color back. But you can keep watching those leaves to see if the problem continues. The visual give away is the completely yellow leaf that is pictured. The leaves don't have tip burn (sign of over feeding) nor do they have the rust spots associated with most deficiencies. Keep in mind that watering and feeding are two different things. You should be watering in between feedings.