Critical Purple (First Grow Ever)

Both. Undernutrition and not enough light. You can lower the light to 30cm or 1 foot. They need light!

1.2-1.5 EC .. ppm from tds pens are calculated numerous ways.. therefore the numbers could be very confusing depending on which equipment you used. Use EC. It is the same measurement regardless of equipment used. If you calculated ppm from guaranteed analysis labels, that is okay too. if that's the casee, 600-750ppm. If you tightly control environment and supplement CO2 up to 1200-1300ppm, you can probably go higher. it will match the accellerated growth potential. 1-1-2 npk ratio and 4-2-1 K-Ca-Mg with S around 100ppm and trace elements likely included in your hydro nute base prodcut.. at an overall concentration around 1.2-1.5 EC is a great place to start, then small adjustments based on observations. the symptoms will be very easly discernable from this starting point, if you see any at all. We can only allow it to reach its genetic potential.. we cannot force or cause anything beyond that... what we do amounts to no stepping on our own dicks or flaps vs some special method that can polish a turd into a diamond. what we do is 5-10% of the total.