Deficiency????

[Newbud]

Hello guys,
Well from what i've looked at in resources section, various threads and bits i've googled i got an idea what the problem is but as there a lot of experienced people on here thought i'd see if someone could give me a definite diagnosis on whats up with my DWC girl.

I using canna A&B in a home made DWC set up which has been thriving up till about a week ago.
She still in veg.
Very good root development, no root issues, nice and healthy there.
Plant looks a lovely green despite the pics, thats just the hps makin em look yellowish.
Infact if it wasn't for this curling the plant would look really healthy indeed.
Damn thing was just thinking how well it was going too lol.
Good job i got a room full of coco girls to cheer me up lol.

I'm thinking mg deficiency from descriptions i've read but pics tend to look different.
Any help plz?

 

[Newbud]

Havin prob putting pics in. Link here to look http://www.icmag.com/ic/album.php?albumid=3700

 

[bigjay]

what kind of water are u using...tap or RO. what is the ph of the water. If your using Ro and your ph is good you might need some cal/mag. It could also be heat stress, which is my next question, how close are your lights?

 

[Newbud]

It not heat but they did get a cold spell due to me being thick and leaving window open in a cold snap lol.
It's tap but its monitered and left for a minimum of 24hr, ph 5.8.
Think its a cal/mg def caused by the cold snap, what you think?
Cheers for ya time fella

 

[MynameStitch]

Can you fill out this form below, also can you get pics without the HPS light on... it hides a lot of the plants problem, because we can't see coloration of the plant or anything in detail.



HYDROPONICS/Aero Ponics/Coco/Soiless/

How long has this problem been going on?
Are you growing in a PVC grow tent? (example: Hydrohut or any other non brand tents)
What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...)
What STRAIN are you growing?
What was the establishing technique? (Were the seed or clone?)
What is the age of your plants?
How long have they been in there mixture they are in now?(coco,soiless etc..)
How tall are the plants?
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in?
What Technique are you using?
What substrate/medium are you using?(Hydroton, RockWool etc.)
What is the Water temperature?
What color are your roots? White? Brown? Are your roots slimy?
What Nutrient's are you using?(If growing soiless)
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful*
How often are you feeding? (If using soiless)
How often are you giving nutrients? (If using soiless)
If flowering, when did you switch over to using Bloom nutrients?
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)
What is the TDS/EC/PPM you are using?
What is the pH of the "Tank"?
Are you sure your calibration is correct on your equiptment?
When was your last watering?
What is your water temps?
When was your last feeding change? (ie. grow-bloom-micro-additional)
How often do you clean your system: example: Flush out water replace with clean water and nutrients?
What size bulb are you using?
What is the distance to the canopy?
What is your RH Factor(Relative Humidity)?
What is the canopy temperature?
What is the Day/Night Temp? (Include flucutaion range)
What is the current Air Flow? (cfm etc.)
Tell us about your ventilation, intake exhaust and when its running and not running ?
Is the fan blowing directly at plants?
Is your water HARD or SOFT?
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water?
Are you using water from a water softener?
Has plant been recently pruned, cloned off of or pinched
Have any pest chemicals been used? If so, What and When?
Are plant's infected with pest's