New top leaves yellowish/lghter green

[Johncena]

First grow.

Top new leafs are yellowish/lighter green, yesterday they weren't like this. I had this before but they became green again. But this time all of them have the issue. And it's happening often for new leaves.leave
ph is around 6.9-.7.2

Bio bizz light mix
Auto flowers ak and Amnesia strain 3 weeks al of them.
12/12 light.
I feed them worm casting tea and root juice bio bbizz

i might have overwatered them. I put water in the middle until run off.

Is there any nutrient deficiency ph problem ?
Red worm casting is enough for weed even though it don't have high npk in it (2.5 -2 -2 )

I searched online but could not decide if this is an calmag issue or other.

appreciate any comments about this.

[Rwise]

PH should be 6.3 - 6.8

[Numb]

Wrong PH and 12/12 it's bad choise. Go 18/6 or 20/4...
But first like Rwise say change PH level.

[Johncena]

Numb
Rwise
thanks for the reply I only feed them worm casting tea that have increased the ph. How do i change ph in worm casting ? Or should i buy liquid nutes and adjust ph when mixing those in water ?

I am planning to transfer them in bigger pot with bio bzz light mix and worm casting mixed together how do i adjust ph then ? Or should i just buy liquid nutes ?

[Rwise]

Many things can give a PH down, sulfuric acid (causes burns) is one I use, vinegar gives a temporary PH down as does lemon juice. Molasses will also reduce PH, bananas etc..
I use sulfur in my soil, with water and air it makes sulfuric acid.
I am all organic, I do not feed from bottles

[Johncena]

Rwise I will try it out and see what i can find to bring the ph level down.
i want to stay organic as well.
i use run off water to meassure ph, with a ph stripe.

Thinking about getting soil tester for ph. How do you test your ph ?

[Rwise]

I dropped $300 on blue labs combo+, I was having PH issues and this does soil as well as solutions. My PH was near 4 so I had to go up up and away, I mean up!