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

soundwavesurfer

soundwavesurfer

Member
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.
 

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below0

below0

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

honkeytown

Well-Known Member
mag deficiency...prolly locked out due to high ph. bring it down to 5.8 and monitor any fluctuation day to day
 
soundwavesurfer

soundwavesurfer

Member
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.
 
Antigen

Antigen

Well-Known Member
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.
 
below0

below0

Active Member
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.
 
Robert Paulson

Robert Paulson

Active Member
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?
 
soundwavesurfer

soundwavesurfer

Member
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?
Pictures 002.jpgPictures 001.jpgPictures 003.jpgPictures 004.jpg
 
honkeytown

honkeytown

Well-Known Member
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
 
soundwavesurfer

soundwavesurfer

Member
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.
 
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