First Hydro Grow, Need a little help (quality pics)

I'm using:
400 watt MH
Tent is 4ftWidex2ftDeepx5ftHeight
Temps are between 80-90F(usually in the 80's but it was real hot here last week so temps went up to 95 at times but it's cooled back down to 80-85)
Advanced Nutes @ full strength for the past 2 weeks (started with smaller doses then gradually used more) They were germinated a little over a month ago and started with a drip system but now they're dwc and they seem to like it better too.
PH is usually 6.0 but it needs correcting from time to time.
Leaves look pale green almost yellowish, some brownish yellow tips and edges too.
I'm not sure if this is gonna get worse or not but any help would be greatly appreciated.

They look a little overfed to me.

what ppm do you have them at now?

looks like to much N, and a little CAL/MAG Def. possibly, how much Cal/Mag are you feeding them?

mag deficiency...prolly locked out due to high ph. bring it down to 5.8 and monitor any fluctuation day to day

thx for the responses guys. as far as nutes go, I've only given them micro, grow and bloom nothing else. i use an EC meter with a 700 conv factor, it usually reads 1.0-1.3. in ppm's that should be 700-900. I'll def start PHing to 5.8 tho, maybe that will help too.

sounds like your tds is in line to me......so yeah ph. lookin good bro

I agree with the above, and also think they are showing a potassium (K) deficiency, which is causing the brow spots at the leaf edges. The interveinal chlorosis (yellow in between green veins) does look like Magnesium def, although Mag should be readily available at pH 6.0. You should try feeding them some Cal/Mag and see if it fixes the Magnesium problem.

Both Phosphorous and Potassium get locked out in hydro at pH 6.0, so I think lowering your pH to 5.8 will help fix those issues.

Antigen said:

I agree with the above, and also think they are showing a potassium (K) deficiency, which is causing the brow spots at the leaf edges. The interveinal chlorosis (yellow in between green veins) does look like Magnesium def, although Mag should be readily available at pH 6.0. You should try feeding them some Cal/Mag and see if it fixes the Magnesium problem.

Both Phosphorous and Potassium get locked out in hydro at pH 6.0, so I think lowering your pH to 5.8 will help fix those issues.

Click to expand...

Potassium gives you larger necrotic patches from the margins not usually so uniform and small like in the above pictures, that doesn't look like a potassium problem to me.

EDIT: The problem def lies with Cal/Mag nutes, and for the curling under and what looks to be slight nute burn, could be a few different things, best to address the Cal/Mag Issue first, and maybe just lower your dosage of Advanced nutes in the meantime to see if that clears up the slight burn on the plants. Also if your giving them bloom be sure to cut down on the dosage of Grow.

i would try to get ur temps down. i'm gonna say your nutes are just fine, you've just heat stressed them. 95 is too hot and will have adverse affects on your plant. you also don't want your reservoir exposed to that much heat. are you keeping track of the temp inside your dwc? what light cycle are you on?

I PH to 5.8 everyday since the last feeding as well as half nute strength. It just looks like they're getting worse. I still haven't tried the cal/mag yet. That is def going to be the next step. Any other suggestions?

all the new growth looks good to me bro. the older leaves that were affected wont look any better...regular feedings now and feel free to cut off the crunchy leaves and make way for the healthy new ones

There is a little bit of new growth affected on one of the plants tho. But it isn't the same discoloration, it's more of a white color. Not sure what that is. I can upload a pic of that later tho.

cool cool...will definitely take a look and make sure we get em under control

so far this is only on one plant. how should I go about getting rid of these damaged fan leaves? cut off the entire branch they sit on?

just snip off the fan leaf, leave the branch.

Alright cool but why leave the branch? It's kinda useless now isn't?