Why is this baby so unhappy?

This purple haze auto is totally unhappy like this for a while. The other plant is the same strain, that one is healthy but I couldn’t make this one comfortable. Its not about watering as I guess but I’ve never experienced like this one before. Any ideas how can I understand?
Seedbank:Original Sensible Seeds
Strain (bagseed too): purple haze auto
Indoor, outdoor: indoor
Tent, Room Size: 1.5-1.5, heigt 2m
Lighting: 2*420 highlight Growlightsaustralia
Light height: 1 meter
Temps (day and night): 25-19
Relative Humidity (day and night) : 50
Added Air (fans, portable acs, heaters, dehumidifiers) : one in, one out
Ventilation: small kabin type
Pot sizes: 20 litre
Soil, Coco, or Dwc: soil
Nutrient type: Canna
Ph numbers: 6
Ec and PPM: we arrange it according to canna guide for each stage
Water Temps: room tempr.
Co2: -

Seed germination date: 4
Veg duration: 25 days
Nutrient cycles (how often feed/water): every day checking with the soil and plant







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Not exactly sure the issue may be a lockout. I’d myself get plain ole water PhD to correct pH and drown the plant slowly do like half gallon wait half gallon wait until u get runoff let some runoff drain away and then catch some in a cup and take a reading of the pH and ppm on the runoff. I bet the pH is off causing a lockout of something needed at this point in the growth stage. And if at most correct PhD water would not harm u at all either.

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The runoffs Ph should be around 5.8-6.2 I guess? Or else?

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And one more question… Can I drown it with tap water ?(normally we dont use it for watering)

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I do mine with tap water just pH it. If u r in coco yes 5.8 to 6.2 if soil or dirt. Then u want 6.5 to 6.8 area for pH. If it is soil u don’t need nutes for a bit in veg if coco u need them from the start

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We try to ask proper questions to gauge issues. That way we arent giving ifo that may not be appropriate for the issue.

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Grow Journal Check List

Seedbank:
Strain (bagseed too):
Indoor, outdoor:
Tent, Room Size:
Lighting:
Light height:
Temps (day and night):
Relative Humidity (day and night) :
Added Air (fans, portable acs, heaters, dehumidifiers) :
Ventilation:
Pot sizes:
Soil, Coco, or Dwc:
Nutrient type:
Ph numbers:
Ec and PPM:
Water Temps:
Co2:

Seed germination date:
Veg duration:
Nutrient cycles (how often feed/water):

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