Heeelllppp. Pics

Hi ppl. My plant is in its 4th week from germination and my main tap root has grown down to the res tank and sitting in the water with nutes feed in. Ph is between 5.5-6.0 my leaves look like there wilting, well the bottom 1s do, so what do i do. Is it safe 4 the roots to be in the water all the time. I have a air stone going 24/7 but not sure if i should stop feeding it on the drip as its in the res tank already. The drip runs every 4 hours for 2 mins. Overwatering or underwatering im not sure. This is my girl taken today
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plus iv just got my 400w hps bulb, can i use it at this stage of growth as im not using it now. Plus how far above do i put the bulb as it gets hot

help would be great ppl many thnaks

plant is looking okay, you can stop that drip feeding, focus on your DWC. actually you need the water just touching the bottom of the netpot until more roots grow down the res then you lower water level so that 1/2 the roots are submerged. the bubbles now are not moistening the medium enough and there is not enough roots in water.
you can use the 400w already only if you have good exhaust ventilation. air-cooled hood even better

the leaves do not look overwaters they would be droopy, they look fantastic and a perfect color I would be proud

a little thin in the stalk but looks fine.

The plant looks great, dont harsh your mellow.. Take the drip off the roots are drinking water, leave stones on 24/7

wtf, they look great