HELP!!!brown spot on leaves -DWC- (PICS INSIDE)

[noreason]

Hi mates,I have a problem with a brainstorm in hydro setup.here infos and pics
The plant is in an hydro DWC tank with other two different genetic,but this one is younger...the other two are bigger without signs.




How long has this problem been going on? 2 days
Are you growing in a PVC grow tent? no
What system are you running? DWC
What STRAIN are you growing? DUTCH PASSION BRAINSTORM
What was the establishing technique? seed
What is the age of your plants? 1 month
How long have they been in there mixture they are in now? 2 days
How tall are the plants? 30-35 cm
What PHASE are the plants in? from 1 day at 12\12
What is the Water temperature? 19-21°C
What color are your roots? White
What Nutrient's are you using? Dutch formula
How often are you giving nutrients? I increase to 0,9 mS every day adding nutes.change water every week
What order are you mixing your nutrients? 50%grow 25%bloom 25% micro
What is the TDS/EC/PPM you are using? EC is 0,9 mS
What is the pH of the "Tank"? 5,4 - 5,7
Are you sure your calibration is correct on your equiptment? sure 100% I use digital tester and chemical too.
When was your last feeding change? I increased a little bit every day
How often do you clean your system: every week
What size bulb are you using? 400w
What is the distance to the canopy? 25-30 cm
What is your RH Factor(Relative Humidity)? 60-80%
What is the canopy temperature? 25-27°
What is the Day/Night Temp? 20-25 daytime - 18-20 nightime
Tell us about your ventilation, intake exhaust and when its running and not running ? running during the day an extractor quite potent,and 2 fans intake.During night only extractor 15 minuter every hour.
Is the fan blowing directly at plants? no
Is your water HARD or SOFT? soft
What water are you using? Tap (0,2 mS)
Are you using water from a water softener? no
Has plant been recently pruned, cloned off of or pinched no
Have any pest chemicals been used? no
Are plant's infected with pest's no

 

[noreason]

I was thinking it's no a salt damage caused by too many nutes inside the rez.
It probably is a starting calcium deficiency because the last time I changed the water in the tank,10 days had elapsed,and I don't know how many Ca my Dutch formula nutes have inside.
If it's as I'm saying I should solve this easily...just change water more often.

C'mon what do you think?

 

[EvilTwin]

Sorry man...whatever problem you think you have is very minor. First pic I see a little browning on one edge and on another picture I see one tiny brown spot. I don't see anything to worry about. I wish my plants looked that good...
ET

 

[Guest]

Hya nore, so all three plants in the same dwc container? All 3 are different genetics or just this one? This one you say is younger. Hrmm

Due to being younger and not having as developed as a root system as the other plants, it could be having trouble competing for the nutrients in the dwc container? That ph is a bit low for my tastes in this stage, but not nescesarily a danger so if it works in your environment normally disreguard this.

From the look at that first pic, the wrinkle (and hard to see but is there even discoloring along the edges?) would lead one to believe something to do with Mn-manganese. The brown spot in the 3'rd picture is not something that looks troublesome, imo more likely it was damaged tissue from something agitating the surface. A bruise of sorts. On the other hand the last pic looks more white than brown, without jumping the gun hard to say; though in many circumstances chlorosis accompanies Mn problems.

Hope this helps

 

[deviant1]

Jus my 2 cents here, but I've always been told to mix micro in to the water first, after that it really doesn't matter which order, grow or bloom.

 

[noreason]

Jus my 2 cents here, but I've always been told to mix micro in to the water first, after that it really doesn't matter which order, grow or bloom.

what does this mean???Maybe I'm not understanding but...are you saying I should add to the water micro nutes BEFORE the others?why?
I add nutes always togheder....grow,bloom,micro in the correct diluition!
Explain me what are you saying please.
Ps:I'm not native English,I don't understand every expression...what does it mean: just my 2 cents here?

Thanks to stop MSG,
however,I'm quite sure I'm having a Ca def,because today I discovered others brown\white spots on a SAGE leaf,another plant with same symphtoms.
IMO it's due to the time I didn't change the water in the tank...my tap water has Ca in it,but not sooooo much.EC is only 0,2.
Here others spot on SAGE leaf


If in a couple of days no more symphtoms will be,I'll have the confirmation it was a Ca def.
Thanks to all to reply...everyone is welcome as ever.

 

[EvilTwin]

Good morning noreason,
I''ll answer your questions if that's all right. "My 2 cents worth" is just an idiom meaning "my opinion" or "my thoughts on the issue".

On the order for mixing in nutes. The reason that nutrients come in different bottles is that certain chemicals interact and can form solids that precipitate out and are no longer available to the plant.

The manufacturers and general hydro guidelines are to add nutrients one part at a time...stirring well before adding the next. Devients post suggested that you should add the micro first. Stir well before adding the others (one at a time) And like you stated...they should be diluted before adding to the res.

Calcium is one of the hardest elements to keep in suspension. It forms other compounds easily. Do you have granular nutrient residue laying on the bottom of your res? That could explain where your calcium is going.

Just my 2 cents worth...
ET

 

[noreason]

Thanks EvilTwin,
I understood now what deviant was talking about.Sure you are talking about flocculation(hope it's the right word in english),but it's not my problem,because when I clean the tank there aren't so much residues
The deficiency has started in the lasts days,after a month of grow...and I added nutes togheder from the beginning.
However,starting from the next time I'll use to give nutes one at time...how many hours do you let micro-nutes inside before adding the rest(grow & bloom?)

I love you ICmaggers,goooood folks!

 

[EvilTwin]

Noreason...
You may not know American idioms but you sure have a good vocabulary. So no residue...I guess that's a good thing though sometimes it's real satisfying to find a simple answer.

On the nute mixing thing. I don't think there's any time interval...once you add the micro and stir it up, then the rest can go in. Much less likely to flocculate when it's diluted.

Hope you find the solution. Looks like it's getting a little worse.
Cheers,
ET

 

[hazy]

maybe add in a bit of cal-mag. Maybe adjust your pH up a little. you say 5.3-5.7. Try 5.6-6.0.
Calcium can be restricted at lower pH.

 

[noreason]

maybe add in a bit of cal-mag. Maybe adjust your pH up a little. you say 5.3-5.7. Try 5.6-6.0.
Calcium can be restricted at lower pH.

I haven't cal-mag and don't want to buy it because I think it's useless for me.
My tap water has a quite large amount of Ca & Mg.....give more of them can lead to trouble I think.
Let's see how this grow come up...it's the first real DWC I have done.

here is the link at my grow:
http://www.icmag.com/ic/showthread.php?p=2835324#post2835324

 

[Bazarocka]

UUmmmmmmmmmmmmmmmmm

UUmmmmmmmmmmmmmmmmm

what does this mean???Maybe I'm not understanding but...are you saying I should add to the water micro nutes BEFORE the others?why?

Because the instructions on the bottles say to do this...

 

[noreason]

Because the instructions on the bottles say to do this...

usually I read everything before I use any product,but for safety I checked on the bottle...but it says ''ADD GROW FIRST THEN BLOOM AND FINALLY MICRO'' As you can see in the pics it's italian but it's wrote exactely so.

However I believe it's better to add MICRO first as all of you said.I was talking about ''flocculation'' some post ago...well,today I change the rez solution and find some strange .....mmmmm don't know how to call....white flabby agglomerations.see pic to understand!
Is it a flocculation phenomenon?



However everythings ok in my grow.No more brown or white spots nowhere on the 2 affected plants.It was definetely a Ca def.

 

[EvilTwin]

noreason...
Sure could be...calcium phosphate flocculation is most common...

In any case, glad your plants are doing better.
ET