Leaves turning slight yellow and some tips have a very little of brown?

[JoeCO.]

Under 100watt flouro, about 76T and 65H. Light is about six inches from the tops now and is about 3-4in tall and almost a month in veg. Any ideas what could be wrong? maybe under watering? I dont know what is too much and too little. Ive just been spraying the soil keepin it moist? should i water more so its not constantly thirsty?

 

[Racefan]

Re: Leaves turning slight yellow and some tips have a very little of brown....???

sounds hungry. What have you fed it? Humidity is too high at 65. 50 is perfect 60 is high side 40 is low side.