Potato thingies are hydro clay balls.
Ive read that they are good to add to the top of the soil to aid excessive moisture loss, they also help in distribution of water (so you dont have your perilite and top dressing wash away), thay also will insulate against too much heat on the top of the soil.
Just one of the many tips I read and decided to try.

At this early stage I dont want to add too much light/heat.
Thats how the tips are burnt, from bringing the wattage up to 104.
These new babies seem to like 80w better for now.
I will be putting them under more light as they get stronger

I thought Leaves Down = not enough water, Leave Up = too much

Ive been investigating around and it seems that my problem (of the leaves curling/cupping upwards) might be moisture stress.

I am going to do some further checking to see if thats the case.

Jar thingy is a small glass vase that I have water and an airstone in.
Humidity is like 0% where I live.