Ppm lower on runoff

Growing blue cheese indoor using mother earth coco coir and gh nutrients. Week three of veg and the ppm on my runoff has been around 350 and my intake is 650. The skunk 1 northern lights and white widow are all coming up 600 ppm on runoff like they should be from what I’ve read. But what’s up with the blue cheese, do I need to increase my intake already?

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