Help have a little problem my leaves are starting to get light green tint + pic

so i Have a little problem my leaves are starting to get light green / yellow tint what's the problem? i water the soil with water PH 6.5 and i use only 50% of the organic nuts tnx alot for the help

the pics is 17 days from when i seed the seed in the soil.
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i would say early sign of nute burn...They are still to young to be getting nutes especially 1/2 dose....i would have maybe gone 1/4 nutes then up to 1/2 in a couple weeks.

Less is More...meaning a little at a time is better than allot at once!

i don't feed my little ones til they show sign they are hungry....usually a little bigger then them.

Not nute burn. More like you need more moisture in the soil. Keep your soil nice and moist, not wet but moist. Organic grows need a moist medium to thrive. Also make sure your lights are not too low. Light bleaching will cause yellowing.

looks like early signs magnesium deficiency, though i havent seen it this early on before. i can be wrong you will know in time.

with mag deficiency lower leaves yellow and may even turn white while veins remain dark green. Blades die and curl upward.

Tnx every one! ill try every thing you said and i will let you know...