What is causing this?

[greenhornets]

How long has this problem been going on? About 3 weeks
What STRAIN are you growing? Unknown
What was the establishing technique? (seed or clone?) Clone
What is the age of your plants? About 3.5 months
How Tall are the plants? 12-13 inches
What PHASE (seedling, vegetative or flower) are the plants in? Veg
What Technique are you using? (SOG, SCROG etc) Topped once at 6 inches tall
What size pots are you using? (Include how many subjects to pot) recirculating dwc 5 gallon buckets with reservior 25 total gallons
What substrate/medium are you using? Hydrogen pellets What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?) Hydro
What Nutrient's are you using? Pure Blend pro How much of each with how much water? Using 205ml of nutrients for 25 gallons of water
What is the TDS/EC/PPM of your nutrients used? 600
What is the pH of the "RUN-OFF"? ph 5.8 in reservior
What method of pH test was administered? Using Strips? pH pen? Pen
How often are you watering? Changed nutrients every 14 days
When was your last feeding and how often are you feeding? Sunday was the last feeding Feeding every 14 days
What size bulb are you using? 400 diy cool tude
What is the distance to the canopy? 18 inches
What is your RH Factor? (Relative Humidity) 48%
What is the canopy temperature? The high at 77
What is the Day/Night Temp? (Include fluctuation range) Day temp at 78 high Night temp at low 66
What is the current Air Flow? (cfm etc.) 265cfm cooling a diy cool tube and exuasting it into a 170cfm fan which goes to a scrubber
Is the fan blowing directly at plants? just above
Is the grow substrate constantly wet or moist? Yes using dwc bucket
Is your water HARD or SOFT? Hard water tds reading 240
What water are you using? Reverse Osmosis (RO)? Tap? TBottled? Well water? Distilled? Mineral Water? Tap
Has plant been recently pruned, cloned or pinched?No
Have any pest chemicals been used? If so what and when? No
Are plant's infected with pest's? No

(What is causing this deficency???)

 

[TrickHomie]

Very small pics mate. Looking from here I would say magnesium defficiency.
But seriously, give us some sensible pics, that reveal more details.

 

[DIGITALHIPPY]

Very small pics mate. Looking from here I would say magnesium defficiency.
But seriously, give us some sensible pics, that reveal more details.

i dont need anymore thats a medium/hardcore magnesium def.
epsom salts! at once!(2 tsp/liter) or calmag/sensical etc.

 

[BudLove]

Hey bro - obvious Mag def as previously stated.

However, this stood out at me:
Nutrient being used: Pure Blend Pro
Amount: 205ml for 25 gallons of water

Now I might be high, and my math may be a bit off, but that's less than 10ml per gallon.

If these plants are over 3 months old they would be considered 'mature' and therefore could certainly use a higher dose of nutes than just 8.2ml per gallon.

Personally, I'd get the EC up to 1700 which should be closer to 13-14ml of PBP per gallon.

...lastly, if you've done reading up about PBP products they almost ALWAYS require the additional CalMag suppliment... so if ya dont have any, buy some and add that in there as well at 5ml per gallon... should fix those ladies up in a jiff.

BL

 

[greenhornets]

What are the names of some of the best products to purchase to fix this deficency? ps tds is at 600

 

[greenhornets]

Could this be n deficency?

 

[BudLove]

Hey green - ya got 2 threads going for the same issue... read the other thread and you'll have your answer.