Seedling leaves are getting wellow

i need help with the leaves getting yellow.
its hydro,50 lit resevoire.ph 5.8 .second week of seedlings.no added nutrition.4 of the seedlings are getting yellow but the rest are fine,
what is the problem.they are in a 50 lit resevoir ,top feeding.

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Dont know much about hydro growing… but they may be hungry. Try feeding them and see if that don’t fix it.

My plants were starving near the middle of week 2 from seed one looked similar to this but it was on the lower leaves I would try a weak dosage on nutes.

Thanks guys.i fed them and they are getting better