8 Days Old: Been out of the Game for a Bit so Trying to Remember

Ok so I got some bubba seedlings that are about 8 days strong. Id guestimate they are about 2.5 to 3 inches tall, just has started its first node. My question is, ive been feeding it just normal filtered water from the fridge (what I used to initially germinate the beans and theyve had like a 95% success rate so far). So I havent noticed any deficiencies in them at all, its a little light on the green tho. Is it just because its so young that it hasnt been able to process all the chlorophyll or do I need to start giving it 1/4 strength nutes or when does feeding schedule start? Figured at 1/4 strength Id give it liquid karma and pro blend grow. Also have calmag, silica blast, and sweet.

Suggestions on when and how much I should give my hopeful to be girls?

TIA.

i wouldn't feed them nutes till 2-3 weeks and i only water when they need to be watered.