Good evening everyone!
Went over to see the plants in person tonight. Unfortunately, it was a little worse than I thought, but they certainly don't look like they are dying or anything.
The problems are all in the lower growth, whereas the new top growth looks pretty good to me. I looked at many photos and troubleshooting pictures while I was there, and the closest comparisons I could find were:
Manganese Deficiency - Likely due to PH drifting too high between visiting the grow
-and/or-
Nitrogen Deficiency - This would surprise me a little, but it's possible I suppose.
Here is what I did tonight:
*All are modifications to the existing reservoir water. I wanted to learn what I did wrong rather than start over with fresh water*
1.) Added about another gallon or so to each tub.
2.) Added 30 ml of Cal-Mag to each tub (this is the first time I've added cal-mag to these ladies).
3.) Added the following Trio Nutes: 15 ml Micro, 15 ml of Bloom, and 30 ml of Grow.
4.) Added 15 ml of HydroGuard to each tub.
5.) PH'd the water to 5.1 (I know it's a little acidic, but it drifts up so fast I can't always get over to add more acid).
6.) Placed my security camera right next to one of the bad looking plants, to take photos over time and observe the reactions.
I will update in 24-48 hours and see if I made it better, or worse.
Thanks guys!