Plants turning Yellow through out whole plant

[Plantlife12345]

Issues:
-Leave discolouration pale yellow between veins
-Minimal brown spots mainly on lower leaves
-Growth has stopped
-loss in smell potency

Spec:
-Gelato
-super soil (coco) - similar to sub cool
-Week 6-7 Veg
-RO water 8.0 but I PH down to 6.2- 6.5 but I’m sure it raises back up
I have given compost tea 4 times.

The next picture as all the same issues and spec but is a Sativa strain.

Then the last pic is the same strain as the 3rd pic ^^. But it’s 3-4 weeks old I’ve only given compost tea once.

Please can you help !!!

[if3gt4]

i would start by checking the PH of the actual grow media and see where that curently stands.

[Covertgrower]

Check ph of run off. Increase nitrogen content. She’s yellowing because she’s hungry.

[dbrn32]

Looks hungry to me too. Could be ph out of range for uptake.