Need a little help

[The Irishman]

It's also interesting that your background EC is 0.1. That's very soft! My RO water ain't far off that. IMO you're underfeeding. What you're seeing is iron def. Fe is immobile and you get that yellowing pattern starting at the growing tips, working it's way out from the center of the leaf. I would look to give them a foliar feed of something with iron chelate and up your EC.

Yeah mate my water has always been between 0.0 and 0.2 straight from the tap

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[Spartangrown]

I agree with grumpy grower, it looks like an iron deficiency. I also agree that you should up your feed next time you water. In the meantime, you could always mix up a water soluble kelp/seaweed foliar spray, if you can't find something with chelated iron to spray.

The main cause just seems to be underfeeding with the A and B. Your instincts were right when you upped the feed. You can still bump it up a little more.

[The Irishman]

I agree with grumpy grower, it looks like an iron deficiency. I also agree that you should up your feed next time you water. In the meantime, you could always mix up a water soluble kelp/seaweed foliar spray, if you can't find something with chelated iron to spray.

The main cause just seems to be underfeeding with the A and B. Your instincts were right when you upped the feed. You can still bump it up a little more.

Cheers bro, yeah I'm making a new reservoir tomorrow gonna bring it up to 1.2

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