hello all first time grower looking to soak knowledge up

hello everyone how are you? I have a 4x4 tent with 3 plants in them 1 tiger milk and 2 cookie wreck. i have a 600 watt dimmable ballast and a 600 wat mh bulb inside it right now. the setting of the ballast currently is at 400 lumens. the temps in the room are a constant 70 to 85 degrees with the humidity being between 40 and 60. i made the mistake of putting the baby plants in pots to big for them and i also made the mistake of adding 1 nutrient shower to early. since then i have flushed them and they are fine. but the tigers milk is starting to yellow and i dont know why....im doing a hydroponic setup and im on my 2nd week. i have added no nutes since the watering before the previous one. i will also add pictures. I think its a nitrogen deficiency because the leaves are yellow and the new leaves are curling. Thanks for the help.

Light feed and get your temps lower if you can. Have fun!

Hi! In the beginning you need to give more nitrogen for plants. I agree with you about deficiency and probably it can be nitrogen but I may be wrong.

I wouldn't say the pots are to big, gives them room to grow and no transplant later. Yes I think they need a light feed.
Need to stay away from that 97° high temp, way too hot. I keep mine around 80°. Humidity a bit low on the meter at the moment, babies love humidity.

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thanks you all for ur answers. im learning so much from u guys and im excited about my first grow

Stressed roots from flushing that huge pot! I start seedlings in 1-2 gallon pots. I water one time(saturate but dont flush) untill about 10-15 days. If they show drooping, give them a teaspoon of water.