Pest or nute problem?

[chevy454]

Hi all, I know this looks like nute burn but I'm unsure. I grow in clay balls, recirc system. Girls are 4 weeks old and my nutes are low 0.2 EC on the truncheon. Iv'e flushed 4-5 times already and no change. What has got me stumped is that 4 plants are completely green and perfect looking all the others have these symptoms. Any ideas greatly appreciated

 

[OlderNOTwiser]

To me it looks like this: https://www.growweedeasy.com/cannabis-plant-problems/phosphorus-deficiency There is a pic part way down the page with a blue background. 5 leaves in progression.

 

[chevy454]

To me it looks like this: https://www.growweedeasy.com/cannabis-plant-problems/phosphorus-deficiency There is a pic part way down the page with a blue background. 5 leaves in progression.

Thanks for that. Iv'e upped the nute levels and given it a foliar spray. Will leave it a couple of days and report. Cheers.

 

[chevy454]

For anybody else who has this problem it turned out to be nute deficiency. Upped the dosage so EC flashing between 0.6-0.8 and gave it a couple of foliar sprays on consecutive days with Go Green, 1ml/L. and their booming. Thanks for the help. Cheers