COCO problem?

[HIGH Alltitude]

HYDROPONICS/Aero Ponics/Coco/Soiless/

How long has this problem been going on? 4 Days
Are you growing in a PVC grow tent? (example: Hydrohut or any other non brand tents) No
What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...)Hand water
What STRAIN are you growing? Master Kush
What was the establishing technique? (Were the seed or clone?) Clone
What is the age of your plants? 20 days from finish, 30 day veg.
How long have they been in there mixture they are in now?(coco,soiless etc..) 50 days
How tall are the plants? 36 in.
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in? flower
What Technique are you using? Hand watering
What substrate/medium are you using?(Hydroton, RockWool etc.)COCO
What is the Water temperature?65 to 70
What color are your roots? White? Brown? Are your roots slimy?White
What Nutrient's are you using?(If growing soiless) CNS 17 coco
How much of each nutrient are you using with how much water?Recomended dose *Knowing the brand is very helpful*
How often are you feeding? (If using soiless)Every day
How often are you giving nutrients? (If using soiless)Every day
If flowering, when did you switch over to using Bloom nutrients? After they stopped veg
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)Bloom only
What is the TDS/EC/PPM you are using?1800 ppm
What is the pH of the "Tank"?6.0 to 6.5
Are you sure your calibration is correct on your equiptment?once a week i calibrate
When was your last watering?last light cycle
What is your water temps?65 to 70
When was your last feeding change? (ie. grow-bloom-micro-additional)just bloom last 25 to 30 days
How often do you clean your system: example: Flush out water replace with clean water and nutrients?flush with clearex
What size bulb are you using?4k
What is the distance to the canopy?12in. on movers
What is your RH Factor(Relative Humidity)?40%
What is the canopy temperature?80
What is the Day/Night Temp? (Include flucutaion range)10
What is the current Air Flow? (cfm etc.)745 out and 465 in
Tell us about your ventilation, intake exhaust and when its running and not running ?90% with lights on
Is the fan blowing directly at plants?No
Is your water HARD or SOFT?
What water are you using? Reverse Osmosis (RO)? Tap? Bottled?RO Well water? Distilled? Mineral Water?Well water
Are you using water from a water softener?No
Has plant been recently pruned, cloned off of or pinchedNo
Have any pest chemicals been used? If so, What and When?Spinasade and organicare, preventative
Are plant's infected with pest's NO

 

[HIGH Alltitude]

Anyone?

 

[BlueHaze]

ph problem.

 

[inreplyavalon]

most folks in coco keep the PH from 5.6-6.1. or 5.8-6.0.

I agree it looks like what i have seen diagnosed as a PH problem and having your PH rise to 6.5 may be causing it.

 

[hazy]

Well, I think that's a calcium deficiency. It looks like an older leaf, calcium will show on older leaves. If it is, then I'd bet that even though your watering with too high pH, that your medium is actually too acidic. You're running 1800 ppms. seems way high. I'd cut the bottle directions in half. Flush to get rid of the salt and finish the flush with half-strength nutes pHed in the 5.6-6.1 range.

Just for fun, before you flush, check you runoff pH. But wait an hour+ before you check it.

 

[HIGH Alltitude]

I am 5 days into the issue, on the first day i saw the problem I stared to add 5ml of calplex to up the calcium and I raised the ph up to unlock more calcium. I also flushed one row for a side by side comparison, still looks the same, the ph that came out was the same that i put into the coco. The issue did start in the older leaves and is moving to the newer ones. Should I lower the ph and keep adding calplex? Thanks for the info!

 

[HIGH Alltitude]

It also seems that it effects the fan leaves that are in direct light first?

 

[JamieShoes]

I'm with Hazy...looks like calcium or boron deff (check mynamestitichs awesome sick plant thread)


I've had this in plants nearing completion myself, my advice to you is if you're going to treat it, then do so gently, the last thing you want to be doing is introducing high counts of anything that'll affected the fnished product. Personally I chose not to do anything about it with mine as I only had around 10 days til completetion.... in my own personal case, nothing seemed to be affected by not treating it so late on, on the other hand if I was only 2 weeks INTO flowering it wouldve given me far greater concern...


but this is just my experiance of things, someone will be along in a moment to tell you something different

good luck
j

 

[HIGH Alltitude]

Anyone else have any ideas, i love input, THANKS.