Little black spots and yellowish grow tips

[chananelb]

Hi, i am a relatively new grower and i am having what seems to be a couple of different problems at the same time.
I am growing a white widow strain in potting soil in a closet.
it is on an 18/6 cycle and about six weeks into veg cycle.
ph: 6.8
fert: 20-20-20
light: 35w x 2 & 55w x 2 cfl
water: under plant reservoir with soil plug, filled whenever reservoir has completely dried out ( finished all the water and then a few hours for soil to aerate)

The problems are as follows: about a week ago i noticed that the grow tips are a very very light shade of green (almost yellow) that is pretty much the same for the whole leaf
in addition i noticed today that there are small black spots on some of the inner leaves - most of the leaves look fine
pics:
full plant pics
https://www.420magazine.com/gallery/data/500/13032009_001_.jpg
https://www.420magazine.com/gallery/data/500/13032009.jpg
and the black dots ( sorry - a little blurry)
https://www.420magazine.com/gallery/data/500/16032009_002_.jpg

thank you in advance for any advice you can offer
and happy days to all

 

[Damagoman]

have you read through this:
Cannabis Plant and Pest Problem Solver - Pictorial

yellowing tips,
most likely some sort of deficiency from a lack of or a lockout
Hydro

 

[chananelb]

i went thru the guide - i wouldnt bother wasting other peoples time if i hadn't.
i am more worried about the black spots in the third picture than the yellow grow tips which are always lighter than the older leaves even though mine are lighter than is normal (i think)
thanks anyways

 

[Damagoman]

Check for bugs?
bottoms of the leafs?

since it's hydro, you check over this too:
Beginners Guide to Hydroponics

 

[chananelb]

it looks clean - no bugs, webs, or flying things when i open the cabinet

 

[chananelb]

its not hydro - i have it in a pot sitting on a resrvoir with a soil wick attached to a hole in the bottom of the pot - the soil aerates but gets a continuous supply of water
https://www.420magazine.com/gallery/data/500/16032009_004_.jpg
https://www.420magazine.com/gallery/data/500/16032009_003_.jpg

 

[Damagoman]

Could be starting to get root rot.

Those roots down in the res?

I'd trim them and re-pot it to a larger container.

 

[chananelb]

i cut of all of the roots that were hanging into the water and weren't pure white and sprayed it with water and nutes to tide it over for the meanwhile. most of the roots, especially those in the soil cup were very white should i trim those also or can i tell which roots are rotting by color?
thank you very much for the help
chan

 

[Damagoman]

white is a good sign, they should be fine.

How long before you start to flower?

 

[chananelb]

i was planning on changing the timer at the begining of next week
but considering what she went thru today i think i should wait another couple of days - what do you think?
this is what she looks like from the top today
https://www.420magazine.com/gallery/data/500/16032009_007_.jpg

 

[Damagoman]

At least a week if not 2,
she looks ready
but better to solve problems and get 'em healthy before flowering.