Must be my ph

Banana peels, egg shells and fish extract ain't a balanced diet.

Probably due to being in toxic soil in pots that are waaaaaaaaaay too small. Dark green ones look waaaaaaaay over fed.

runoff is never super accurate. But, soemtimes it's all you got. Those soil pH meters are imprecise too. test runoff, if it's extremely acidic or alkaline, that's possible. N is slightly more available closer to 7 than 6, so it would need to be a pretty wide margin to cause an issue. google "nitregen availability pH table" and you can see some rough estimates of a safe pH range - not idea, just safe. soil should be 6.5-6.8, if using "soil" fertilizers. can't assume this stuff just from visual symptoms. They are not discrete. Try to verify... pH testing like i said is a bit rough in this context, but if you form a baseline when things are workign well, it'll be informative when things get out of whack... you'll know the expected offset.

Check your other question for more answers my guy....

yes it could be ph if everything else is the same across the board but some olants are just hungrier. but not normally to this extreme. Feed and check ph and correct if