Neon green leaves - N deficiency ? -pics in the link below

Thanks @AsNoriu I do know it's low PPM , but using the recommended dosage by biobizz I've seen that if I put more bio-grow the EC will be higher too , around 1.5 EC or higher,will it be fine? I'll increase the bio-grow from 1ml/l to 1.5-2ml/l and see how it goes. Should I increase a bit the dosage to the flowering nutes too?(bio-bloom/top-max) Also waiting for week 4-5 to give them some PK 13/14 -from Canna - for one week only

What you been putting in, if difference is more that 400 it's a lockout, but !!!!! 500-600 is ridiculous low for soil or for soiless ... It's flushing achievable results. I said you yesterday, if all you say true - she is hungry !!! Normally ran out of soil is around 700-800, yours lower .... Feed her ! Don't bombard, but feed her up to 800 ppm. If no leaves drop, do it again, go with water/feed/water/feed regime and let it dry !!!! Leave colour won't return, but you will see some veins going back green, spread will stop, she will drink ! Good luck !