To get so far only to have troubles is a pain.
They are all acting the same now ?
Just generalizing , ,,,
Seems like everything was going okay up until your last watering, and ever since then your plants have started to present like this ??
True?
Would you say ,your last watering was identical (in make up) to the previous one before ???
Reasoning- if they did not react the same ,
how could the feeding have been the same??
Just spitballing, dude. I feel your pain.
Nitrogen or high PPM burn typically starts at the tip and works its way back. I do not see that here.
I see heavy leaves. I see leaves clawing down. I see blades wilting inwards.
Kinda looks like the plant is refusing whatever was in that watering can.
Hard to get or give good advice.
For myself ,when all of the parameters are sticking to the middle of the road everything seems a-okay.
I find when I am having troubles it's because something is not in the middle of the road anymore.