Is This Nute Burn or Something Else?

Discussion in 'Sick Plants and Problems' started by Jonny Panic, Aug 8, 2017.

  1. Hi everybody,

    This is my second grow, so I'm still new to all this. I have a 36"x20"x60" Apollo grow tent, and I'm running a custom 200w LED fixture. I'm also using a cooler for DWC, and running a custom water chiller made from a 72w peltier cooler. It keeps the water at a consistent 67 degrees. I'm only getting these problems in the GSC from BC Bud Depot (from clone). Last week I changed the res over to maxibloom from maxigrow and used the same EC (around 1200 uS/cm which is about 15g in 5 gallons) and the GSC started having problems. I diluted the mixture down to 900 uS/cm because I think it's nutrient burn, but I want to make sure it's not something else. The northern lights is doing great, this GSC seems very sensitive to nutrient concentration and pH shifts. What do you think?

    Thanks again!



    Let me know if you can't see the pictures

    How long has this problem been going on?

    About a week

    Are you growing in a PVC grow tent? (example: Hydrohut or any other non brand tents)

    It's an Apollo Horticulture grow tent.

    What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...)


    What STRAIN are you growing?

    GSC from BC Bud Depot and Northern Lights X Big Bud from World Of Seeds

    What was the establishing technique? (Were the seed or clone?)


    What is the age of your plants?

    4 weeks (3 weeks veg from clone and 1 week flower)

    How long have they been in there mixture they are in now?(coco,soiless etc..)

    1 Day

    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)

    Mad Farmer Silica, Botanicare CalMag, Mad Farmer H202 (only when absolutely necessary), General Hydroponics Maxigrow and Maxibloom

    How much of each nutrient are you using with how much water? *Knowing the brand is very helpful*

    For first week of flower I did 14g of Maxibloom, 15ml of Silica, 20ml of CalMag for an EC of 1200 uS/cm. I just swapped the water out for a mixture that contained 10g of Maxibloom for an EC of 950 uS/cm

    How often are you feeding? (If using soiless)

    I mix a new batch of soup and replace the equal volume with plain pHed water

    How often are you giving nutrients? (If using soiless)

    See above

    If flowering, when did you switch over to using Bloom nutrients?

    First week of flower

    What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)

    Starting with Maxigrow and switched to Maxibloom during flower

    What is the TDS/EC/PPM you are using

    Under 1200 uS/cm

    What is the pH of the "Tank"?


    How often are you testing your pH/PPM/EC/TDS?

    Every other day

    Are you sure your calibration is correct on your equipment?

    pH is calibrated, EC meter is new so it should be close

    When was your last watering?

    Just topped off the reservoir an hour ago.

    How often do you clean your system: example: Flush out water replace with clean water and nutrients?

    When I replace the water with an equal volume of plain pHed water (usually takes a week during flower)

    What size bulb are you using?

    200w custom LED COB

    How old is the bulbs you are using?


    What is the distance to the canopy?


    What is your RH Factor(Relative Humidity)?

    68 (it's swampy here right now)

    What is the canopy temperature?


    What is the Day/Night Temp? (Include flucutaion range)

    Usually 80 during the day and down to 77 at night

    What is the current Air Flow? (cfm etc.)

    100 cfm

    Tell us about your ventilation, intake exhaust and when its running and not running ?

    TD-100 for exhaust

    Is the fan blowing directly at plants?

    Small clip fan about 12" from canopy

    Is your water HARD or SOFT?
    What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water?

    Using 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?

    200 uS/cm

    Are you using water from a water softener?


    Has plant been recently pruned, cloned off of or pinched

    Topped 2 weeks ago

    Have any pest chemicals been used? If so, What and When?

    No chemicals

    Are plant's infected with pest's

    Not that I can tell
  2. Dropping the nute strength helped a lot, it's very weak but they seem to burn really easily. Is this common?

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