Very much appreciate the help here guys!
Update: Plant on the right was the issue. Leaf at bottom of pic.
So, I did nothing Monday night after posting. Read the newer replies in the morning, smacked myself in the forehead and moved a fan directly on that pot. Never occurred to me to make her search for water. (and this is why I'm here. lol) I was too concerned with the possibility of the coco getting so dry it would leach water from the soil below.
No water for 2 days (I did spray JUST that 1 leaf with the epsom salt mix Tues,Weds,Thurs and it made the spots more pronounced but stopped it from continuing).
Yesterday morning I dumped a quart of water in the tub and let it soak into the soil below the coco (one bonus for these fabric pots). She was looking thirsty by Weds night. She woke right up over night.
New growth looks great. No signs of deficiency but not quite as dark as her older sis on the left (confident she grew into the soil over a week ago, she's a bit darker than the pic shows). I do have the runt of the litter doing the same thing now so she's on the same hunt for water to get to the soil.
Looks like I'll be putting a little more soil under the coco next time. I have to admit my estimation was pretty close there. Now we'll see if I used enough soil to feed them most of what they need for the journey.
Thanks again guys!!
Started LST today as well.