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Comments, suggestions, anyone. 13 day old GDP auto. 3 gal. fabric container. Coast of Maine Stonington blend. Amended with -1 tsp. Dr. Earth Home Grown 4-6-3. -1 tsp. Dr. Earth Flower Girl 3-9-4. All Organically grown. Paludarium (aquarium) water. pH 6.4 or so. Water temp. 69 F.
To me seems cal mag deficiency. Did you check the EC of the water itself? Do the soil has enough dolomite lime or similar in it? Try also with a more acidic pH in the vegetative period.
Hard to tell, missing a few pieces of the puzzle...but looks like mag and P issues, probably caused by light being too intense, or too low and over watered soil.
Raise your light. Let your soil dry out before watering again.