How long has this problem been going on? 2 wks
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...) Ebb & Flo
What STRAIN are you growing? GDP
What was the establishing technique? (Were the seed or clone?) Seed
What is the age of your plants? 8 wk Mother Plant
How long have they been in there mixture they are in now?(coco,soiless etc..) 5 wks
How tall are the plants?2 Ft
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in? Perma Veg
What Technique are you using? 24 hour light
What substrate/medium are you using?(Hydroton, RockWool etc.) Hydroton
What is the Water temperature? Flux from 70-85 F
What color are your roots? White? Brown? Are your roots slimy? Was white starting to turn brown.
What Nutrient's are you using?(If growing soiless) CNS17 for coco / Florilicious Plus / SuperThrive maybe 6 drops in 30 gallons
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful* CNS17 for coco 20ml per gallon / Florilicious Plus 10-15 ml in 30 gallons
How often are you feeding? (If using soiless) Ebb & Flo every 4 hours 6 times.
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) CNS17 then Flor Plus then Superthrive drops
What is the TDS/EC/PPM you are using EC is at 1.4-1.6
What is the pH of the "Tank"? 5.0-6.0
How often are you testing your pH/PPM/EC/TDS? Everyday
Are you sure your calibration is correct on your equipment? yes
When was your last watering? 2 hours ago
What is your water temps? 80F
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?Once a month
What size bulb are you using? 12 T5 day flourescents
How old is the bulbs you are using? New
What is the distance to the canopy? 12 inches
What is your RH Factor(Relative Humidity)? 50%
What is the canopy temperature? 74 F
What is the Day/Night Temp? (Include flucutaion range) 70-85 F
What is the current Air Flow? (cfm etc.)
Tell us about your ventilation, intake exhaust and when its running and not running ? Always Running
Is the fan blowing directly at plants? Yes
Is your water HARD or SOFT? Hard
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? RO
If using tap water, what is the ppm/EC/TDS of the water right out of the tap?
If using RO,Distilled,mineral water, what is the ppm/EC/TDS without any additives? 0.00
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? If so, What and When? NO
Are plant's infected with pest's? NO
1.4-1.6EC does seem a bit high, also the plants could probably be a bit closer than 12" from T5's, or at least I run 'em closer. More light intensity requires more water and nutes, which they may be getting a tad too much of. The clawing doesn't look too bad, I'd just lower the nutrient concentration. The clawed leaves probably won't go flat again, you're just looking to prevent more.