Any guesses what's wrong?

Plant burning week 3 of flowering.
Soil grow using r.o water, cali magic cyco bloom a+b and cyco potash. E.c is 1.4


I'm thinking too much potash?

Flushing it and reducing potash by half I guess

pH? Don't know your newts so you'll have to answer as to where's the nitrogens coming from?

Looks a little light burnt to me. What lighting and how far from plants?

Looking from the pics I would say to much nutes if it was me I would give just water your next watering and reduce your nutes a bit and see if that helps.

It was the potassium ladies and gentlemen. Did a red change and just used cali magic and bloom a+b from cyco. Everything is happy again.

Good to hear! Is there cal/mag in your nutes? Gotta have that with ro water!

Bugeye said:

Good to hear! Is there cal/mag in your nutes? Gotta have that with ro water!

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Yup r.o wayer cali mag cyco blooma+b