HPS can be cheap to buy up front but buying $100’s of dollars worth of bulbs every few months get’s old. An oil-filled radiant heater is a good option as they don’t produce light for cold nights.

The pic with the damaged/deformed leaves is not bug damage but root stress most likely caused by the pH being out of range when the leaf was forming. Initial signs are leaf twisting/deforming that will eventually start showing weird splotching marks. When just the edge of a leaf curls up a little, that’s from humidity being a bit too low for the temp.

The more you spray and wet the plant, the longer it will take to acclimate to lower humidity out of the dome. I never spray clones in a dome anymore.

No such thing as too much water. Only not enough oxygen. The lack of oxygen that suffocates roots has nothing to do with any form of hydrogen.

They will not consume much water or minerals when they’re small. Their consumption will increase as they grow bigger.