Potassium Deficency? or something else?

[DrDank]

DWC/Waterfarm, Organicare nutes

I'm having a hell of a time adjusting to the Organicare nutrients. I don't know whether the pH is way off, or there is an actually deficiency.

Any help is + rep

 

[wizard82]

It's very important to get your ph in the sweet spot to uptake all the macro and micro nutrients, which is between 5.8-6.5.

 

[stilljonzen]

How much light are you pushin on them, how close is the light to the canopy. Almost looks like to much light, but not sure

 

[DrDank]

It's very important to get your ph in the sweet spot to uptake all the macro and micro nutrients, which is between 5.8-6.5.

Do you use a digital meter? Since I switched to Organics, the water is always dark brown, so i can not use the GH pH liquid tester. I read mixed things about digital pH meters, so I haven't bought one yet.

I've changed the res and added acid to bring it down, but I'm afraid of adding too much.

How much light are you pushin on them, how close is the light to the canopy. Almost looks like to much light, but not sure

It's a 400w hps. I know it's not light burn, but thanks. It's hard to tell from the pictures; I don't have a great camera.

 

[Bubba Kushman]

Potasium deficencys cause rusty colored leaf margins, spots and blotches. Yours looks more like a sulfur deficency.