Im not the on call doc. Peeps are gonna ask the basics, medium, lights, nutes, pH etc…
The more info you share on your grow makes it easier to pin point deficiency.
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@Wang
Welcome to the group my fellow grower 
Some times things are slow around here but this group really can be the most helpful grow forum I know of.
Unlike other forums I’ve seen, most growers here hold back on advise till we have a good understanding of what you are working with so we can more accurately advise what to do.
The visible symptoms I see such as “taco leaves”, “clawing”, “dead spots”, “darker leaves on bottom then top”, and overall sickly appearance could be many things.
It looks like light intensity is to high, but this doesn’t mean that simply raiseing the light or dimming it will fix them.
The light could be just fine but rather the environment such as temperature and humidity is out of wack causing them to not be able to use the available light.
All that could be just fine and it’s simply the ph is out of wack basically causing the same issues…
Could be root issues such as root rot or some kinda pathogen…
I’m confident if you can provide more information such what’s on the “grow support ticket” that was posted in you’re other post, we as a collective can help you get back on track 
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This ^^^ gotta look at all parameters before a diagnoses can be made. Sorta like when ya go to the doc. They run a crap ton of tests before they diagnose and prescribe “the fix”
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The following info will enable us to help you with any problems.
A support ticket will help us help you. Can you please fill out a support ticket? Please include what type of water you are using (RO, distilled, tap.)
COPY/PASTE the below list into your forum post.
Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so; Or post
NA (non-applicable)
• What strain, Seed bank, or bag seed
• Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
Soil brand and type
• Vessels: Pots, Grow beds, Buckets, Troths
• Runoff pH
• Runoff PPM/TDS or EC
• Indoor or Outdoor
• Light system and wattage
• Temps; Day, Night
• Humidity; Day, Night
• Ventilation system; Yes, No, Size
• AC, Humidifier, De-humidifier,
• Co2; Yes, No
If growing Hydro some additional questions:
-DWC? RDWC? Autopots? Ebb and Flow? Other?
-Distance of liquid below net pot (DWC)
-Temperature of reservoir
-TDS of nutrient solution
-Amount of air to solution
Always try to upload a clear picture of any issues you may have to allow the community to assist you. Pictures taken under natural or white lighting are by far the best.
Add anything else you feel would help us give you a most informed answer should be included. Feel free to elaborate, but short and to the point questions and facts will help us to help you in a more efficient manner.
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