watering fan leaves

Hi Guys So I'm growing in pure coco coir, mixed with perlite. I have been watering with water and a touch of rhizome liquid from canna between 5.5 & 5.9, PPM 95 It has been 10 days approx. and this is what I have. Autoflowers by the way. Now first off, the colour of the plants I'm a bit...

I have been researching over the last view days of N toxicity. People describe the problem clawing that looks like a bear claw or eagle claw. So far the recommendations have been to flush. But before I do that I would like to be sure. I am only asking because I do not see any yellowing. Or any...