Indoor, hydro, blueberry autoflower plant

Second time grower. Autoflower and hydro. I am using a “zero water” filter to remove dissolved solids down to close to zero before adding nutrients, adjusting ph, and checking PPM.

My leaves (week 5, flowering commenced) have blotchy bronze/brown spots which I have read is probably a calcium deficiency. I have been using 1 tsp CalMag/gallon of water, and change my water weekly. 1.4 gallon aerogarden setup.

Since the brown spots persist on new growth after a while I assume I am not using enough CalMag since I am starting with RO type water that has zero nutes in it.

Thank you in advance

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It’s possible but would be helpful to fill out a Support Ticket and include pictures in white light.

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 (photo or auto)
-Age of plant
-Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
-Vessels: Type and capacity of container (fabric, plastic, etc)
-PH and TDS of Water, Solution, runoff (if Applicable)
-PPM/TDS or EC of nutrient solution if applicable
-Method used to measure PH and TDS
-Indoor or Outdoor if indoor, size of grow space
-Light system List brand and wattage/spectrum
-Actual wattage draw of lights
-Current Light Schedule
-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 in white light of any issues you may have to allow the community to assist you.