help with my yellowing NL, 8 days old

[r1984]

hi all think ive got a big problem with northern lights, its 8 days old and turning yellow, under a 400watts hps, 12" ie 1ft away, have a fan blowing over so i dont think heat is the problem as it averages 75f-80f. im using b&q multi purpose in 3 gallon pots, im having to use tap water have not give them any nute yes as they only 8 days old, does anybody know what this could be to do with? could the compost be to hot? ie nutrients.
any advice will be appreciated as my other 2 northern lights are starting to do the same

 

[wg]

Light is too close, way too close. Seedlings should be 34-38" from the top. Tap water is fine, no nutrients is good. B&Q Multi Purpose may have some nutrients in it by the name of it.

How many times have you watered it in 8 days? Would you like me to move your thread to the infirmary? More views there!

 

[r1984]

hi i looked up about how far the light would be with a fan blowing over but i did think it might be too close only being 1ft away. ive only gave them a few good sprays at the top of the compost, then a proper water today. yeah moving it to the infirmary is good please. thanks for the reply

 

[wg]

For seedlings with a 400W HPS, at the bare minimum, 24" is what I'd go for. Even with a cool tube the temperature isn't the issue as much as the intensity is, in my experience. Moving to the infirmary!

 

[r1984]

hi iv put the light at 2foot to see if it helps cheers

 

[Renaissance Redneck]

:karma Cloud: for you and you gals, 1984!
wg know his stuff, Brother. You may want to consider backing the light off another foot.
I looked up B&Q multi-purpose, and it gets some mixed reviews, especially for product consistency and problems with root development in seedlings.