Can anyone tell me what this is.
The pattern on the leaf makes me think you got water on it and the lights burned the leaf where drops were.
Rust colored spots are often calcium deficiency, although this doens’t look like it to me. @Myfriendis410 what do you see?
Here is a calcium deficiency.
.
Check the under side of the leaf for pests.
1 Like
How do you fix your more cal mag???
I guess where I’ve grown outside for so many years never had this problem because the rain added the calcium.
Or you think I should flush and start again??
Looks like splash to me.
How about filling out a Support Ticket and give us details of your grow. We can likely get you tuned up.
Add an overall picture or two in white light too if you please.
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
- Vessels: Pots, Grow beds, Buckets, Troths
- PH of Water, Solution, runoff (if Applicable)
- PPM/TDS or EC of nutrient solution if applicable
- Indoor or Outdoor
- Light system
- Temps; Day, Night
- Humidity; Day, Night
- Ventilation system; Yes, No, Size
- AC, Humidifier, De-humidifier,
- Co2; Yes, No
Always try to upload a clear picture of any issues you may have to allow the community to assist you.
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 help you in a more efficient manner 
Thanks!
1 Like
I agree with the above. Looks like water/solution splash to me 
I haven’t splashed water on any of the leaves.
