Please help me diagnose...

[goldenstate005]

Hi everyone at IC! This will be my first post of many to come im sure. Next time I will be doing a grow diary. Anyways right to the specs...

2 DP Ak-47
400 hps with 180cfm hydro farm cage blower (I believe I need a larger one)
DWC
B.C. Nutes (veg at 900-1000ppm) (currently flowering at 750-1000ppm)
Temps: 80-88F with light on 70-75F light off
pH=5.5-6.0



Since this will be my first post I am sure I left out some specs but ask and I shall tell please!!!
Now to my problem... Here are many pics to show the current problem that I believe to be either cal/mag or something else. It started early in veg with only 1 to 2 leaves being affected but now since switching to flower MORE and MORE keep on showing up. It is in the middle to new growth portion of the plant. Every book and thread I’ve read just does not seem to pin point my problem. I went out and bought some Cal/mag to try but I still need some opinions.

 

[sproutco]

Zinc deficiency? What exactly is in your nutes? Can you give ppm of each element or %? ex: 150 ppm nitrogen or 3% nitrogen by weight. What does your root growth look like? Vigorous?

 

[goldenstate005]

Yeah I use B.C. Boost in every stage.. Veg and flowering. While also using B.C. Grow during veg and B.C. Bloom during flowering.
Boost contains N=3.11%, P2O5=0.0%, K2O 2.0%, Cal=3.2% and Fe=0.04%
Grow contains N=1.19% P2O5=3.24%, K2O=6.53% and other micro nutes in small quantities.
Bloom (which seems to be when the problem became most obvious) contains
N=1.14% P2O5=4.43% K2O=7.15% and other micro nutes in small quantities.

Also I use RO water therefore I thought (newbie) it could be cal/mag due to the nutes not providing enough.

As far as Zinc, the Boost contains 0% and the Bloom only contains 0.0139%.

When creating mixture of nutes, I use the manufacture recommendations to achieve the proper ppm and then test it with my pen.

 

[goldenstate005]

Sorry I missed the roots questions... Yeah they are huge totally some good root porn! Although I forgot to mention that the two are in ONE dwc container that is a samller size than I usually use but there seems to be plenty of room.

 

[sproutco]

I am not sure how much phosphorus you are providing. If you were feeding 200 ppm p2o5, which would be about normal for a "bloom booster", your zinc would be .0139/4.43 x 200 = .63 ppm which is more than enough. If your curious, you can figure out exactly how much you are using by looking for the weight of the package on the label. (i assume this is a liquid) You would subtract the weight of water from this to find weight of the elements total then multiply by % phosphorus, for example, to find just the weight of an individual element total. So you would use so many ml out of the bottle. ml used/total ml that you found the weight of = weight used 1 gram in a liter = 1000ppm You can look at the common ranges for nutrient solutions in the thread on how to make your own in my signature. Did that make sense? I need a drink so I am a little off right now. :friends:

I did not see magnesium in your list of the fertilizers.

I am starting to think this could be temperature related. High temperatures in the air (upper 80's) and cool root temperatures.

How often do you completely change the water?

 

[goldenstate005]

I change water out fully every 7 days. Anyone have any thoughts??

 

[outame 2]

According to technifloras web recipe,the flower one is at 1575 ppm,so why are you flowering at 750 1000? And are you using awesome blossom?If they are drinking heavily,remember to add back what they drink as to keep the salts from concentrating,and causing lock out.

I use BC exclusively,so I think they are just hungry...bump them up...and wait.

 

[MynameStitch]

dont listen to the back of the box nor listen to the manufacters stuff, alot of times its for other plants and they will burn the plants

better to start out light and work your way up

its a calicum problem going, but you got other problems as well
is only the upper half of the plant being affected?

can you take another picture of the plant?

how close is your light and what are your water temps?

how big are these plants?

in hydro you want ppms to be around the size olf the plant

you wouldnt put high ppms for a plant that isnt very big

the only way you want big ppms for small plants is if they are in a system with many plants and running a SOG grow

ro water has almost nothing in it which is why you get low low ppm's
calicum and magniseum are removed along with other benifical nutrients

you also might have some heat issues, some plants may not be able to take 88 temps and the canopy may be affected first, which can cause bleeching

the 2nd to last pic can you take a close up of the affected leaves that are on the top canopy?

 

[sproutco]

its a calicum problem going

I would think there would be burned margins and tips of the leaves. His margins are green with the interior of the leaf yellowing.

You never mentioned concentration of magnesium in your fertilizer.

 

[MynameStitch]

ok, my bad, last time i help so late at night lol

bad call on my part.

but golden state need better pictures and answer my questions i asked ya

 

[goldenstate005]

Outcame: The reason I am using the lower ppm's is because I obviously have tried higher but I thought the higher ppm's could be causing the problem. But now that I have lowered the ppm the problem still presists so I will bring them back up.

Mynamestitch: 1) I agree thats why I never start with high ppms.
2) Yes it is on the top/middle portion of the plant. It seems to be on more mature leaves. The new growth starts out healthy with just a bit of burnt tips and eventually some of the fan leaves turn into the pics I have posted.
3) Yes I can take more pics but not until later tonight.
4) My light at the current time is ~10-12 inches from tops. With my hand under the light it is not hot at all. The water temps during light on are 75F, lights off not sure.
5) These plants are rather large. 4 foot tall and diameter of roughly 2.5 feet. I vegged for 4 weeks and they are a stretchy pheno most definatly.
6) I will try to take the correct pics that you are looking for...

Sproutco: The Mg conc. is B.C. Boost=0% B.C. Bloom=0.852
Just recently (2 days ago) I purchased some Cal-Mag and added 10mL per gallon.


Note* I did not mention that the problem is mainly on one of the plants that is in the same DWC container as another. Maybe some fighting for nutes or something... Just a thought

 

[goldenstate005]

Bump for pics

 

[teddybud]

Your new leaves are looking fine to me.. as far as I understand the old leaves don't turn back to their original color after that extensive damage.. but I know thats how my plant looked after a nuit burn once it had recovered..

thats during the nuit burn here is it recovered and trimmed some



but dont take what I'm saying to much to heart cause I'm still learning.. just trying to lend a hand.

 

[goldenstate005]

Wow, well I was hoping for a little more help from some of you out there... I read all these other posts and gain much knowledge but I really would like to figure this out. Thanks

 

[outame 2]

Well have you bumped them back up to the technaflora ratio yet?If so the affected leaves won't recover,but the plant should take off.

 

[sproutco]

The way I calculated, you should have enough cal/mag in the original fert without having to add more.

 

[goldenstate005]

Alright guys, well it has been 4 days since my last post and heres the status.. Bumped nutes back up to 1400-1500 ppm while topping off everyday since they are drinkers. But the problem still is occuring. The new growth has less fan leaves and smaller ones but they have the same charcteristics as the problemsome ones. (little brown/rust colored spots that develop into taking over the whole leaf) Can anyone at least say what they think it could be!?! The only real thing I have ruled out is bugs.

 

[sproutco]

Looking at % of the elements in your fert does not really tell us a whole lot. Total disolved salts ppm gives us an indication of how strong your fert is but not much else. I think you should try and figure out your nutrient solution in parts per million of each element like 150 ppm nitrogen, 100 ppm phosphorus, etc... that way you can compare what you are doing to other nutrient solutions that are famous like Steiner or Hoagland and what icmaggers are using.