White spots? Possible cal/mag def? Maybe something else

d4money1

Active Member
I have one jack herer plant going on week 3 of flower and white spots started to appear. I had been using Brita filtered tap water to water the plant. But then switched to distilled water last week because our tap water down here is a bit hard, and I forgot to buy cal/mag and add it to the distilled water before feeding it. Now white spots started to appear. I checked for spider mites to see if that was it. But I don't see any webbing or spider mites so I think it's just possible a cal/mag thing since I didn't add any.

What do you all think? I'm gonna go get some cal/mag today and feed it to it during my next watering along with some molasses.

Here's a summary of my setup:
-600 W MH in a AC hood reflector (my HPS for flower broke. I'm gonna buy a new one this week)
-2x4x7 grow tent
-High CFM exaust fan with carbon filter
-Intake fan that's just pulling in air from the room.
-I have an AC in the room running at all times so temps stay at 70-75 deg.
FFOF and light warrior soil mixed 50/50
And I use all FF nutes

I'll add pics in a sec.
 
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