2 Week Old DWC Plant showing some Leaf Discoloration

Spriggley

Member
Hi everybody,

So I finally started my first grow, after lots of research around the web (and this forum especially, you guys are great). My babies are about 2 weeks old, in a closet-DWC. Unfortunately, one of my ladies (I hope) is starting to develop some discoloration on her leaves. It started as what looked like nute-burn after I foliar-fed her some 1/2-strength solution, but then progressed to other spots and other leaves within a day or two. Now the new growth appears to have the beginnings of the same problem.

Some info:
She's in a 5-gallon bucket with some half-strength FoxFarm Grow Big solution, since she is reasonably young still. I don't have a TDS meter yet, as this is my first grow, so I don't know that.
The pH has been right around 5.5, and the closet is kept around 82*F, and since I rent and can't mangle the closet for ventilation, I try to keep the door open when I am home, and keep a box-fan constantly either directly on the plants or helping blowing some air under the door (not ideal, I know, I need an oscillating fan soon too).
The plants are on a 24-hour cycle, and I have backed off on foliar feeding since this problem began. Lights about 4" from plant top.
I'm using a ~250W HO T5 setup (http://www.discountgreenthumb.com/index.php?route=product/product&product_id=3288)
I was using frozen bottles in the res to keep the temp down, but I freaked myself out when I accidentally snapped the tip of a little root by brushing it with the bottle, so I'm devising alternate means now...
Can't think of anything else, but please let me know if any other info would help diagnose! Check out the pics, too!

I currently have an alternate res sitting out with some tap water in it, so tomorrow I will probably swap it out. I'm considering letting it have at some plain water for a day or two, or possibly just measuring a new nute soup. I don't really know how to help her, and I feel like a bad parent... help!
 

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pagger

Member
hi mate ya need that tds meter quick mate guess work all well good but not so with hydro! shes looking ok besides what looks like either a newt burn or i was thinking a spill on leaves with ya newts n lights burnt it but dont know how hot the t5 gets? poss mag diff id cut the newts for day or two let her settle se if it changes then start on less mills per ltr ! ya bottle problem mate rather crush one or two little ones than get root rot cos of ya temps! i would find some string or a plant tie n just connect a bottle of ice to the air pipe so it stays put ? hope ya get it sorted looks clean mate! also cover that bucket in silver tape so the light reflects off cos black soaks heat up ok!
 

Spriggley

Member
I actually just found these little ice pack things and I'm gonna use the string idea with them, slip them in on the side, I think they'll stay in place better. Also I need to get on that silver tape thing.
One question, if I do flush the res and just leave her in plain tap water, how long will she be okay with no nutes? A day or two?
 
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