Beardless NL - Should I be concerned?

Troubleshooting Diseases
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When checking in on them yesterday I noticed these spots on #1. I inspected the other girls and it appears to be isolated to #1. The spots, few in number are on the tops of the plant and a few on lower leaves. The affected lower leaves are mostly in clear view. I am hoping it is from the application of Captain Jacks spinosad spray I used to eradicate fungus gnats. Contradicting this thinking is the 3 other plants are not similarly affected. So I wanted to get your assessment please. @Hellraiser @dbrn32 @BobbyDigital @Covertgrower @Cannabian @Chasfitter @kellydans @repins12
This is the recent watering schedule and PH readings. Significant increase in PPM between 6/25 and 6/29. At the time I attributed the increase to first use of silica. Now - not so sure. Today is day 31 on 12/12.

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Although not affected, here is runoff info on other three plants.

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#1 otherwise, and the other plants look great and extremely healthy.
The next flower feeding will be 7/4 or 7/5 - thoughts. Only water for #1? or OK to feed.
I have not flushed them because runoff PH has been consistent on not decreasing.

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If you have been spraying plants with anything I would expect a few random spots. Kinda weird it’s isolated to a single plant, I agree. But that could be relative to the plants position in the room or something.

I would monitor from here a d see if this is rapidly progressing or not. As always, if you feel the need to spray plant try do so right at lights out

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Looks like random nutrients that got dropped on a couple of leaves.

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Pictures aren’t loading for me for some reason. That ppm spike usually would indicate a salt buildup but your ph and amounts you’ve fed say otherwise. What was your ppm in for the calmag and silica? My cal mag only adds 200ppm at 5ml/gallon…curious to what the ppms of the silica is.

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CalMag & silica boost PH 8.37, PPM 436 EC 927. Had to PH down to 6.21, 486 and 1035. The PPM of runoff doesn’t make sense to me either.

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No additional spots this morning. Maybe I hit that section of the plant with a little more spray. The lights were still on for a couple hrs after spraying.

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