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.

It’s ok to use but I wouldn’t spend money on it. Deuterium is 1 of 2 stable forms of hydrogen. It’s not very abundant in water so it’s not something I’d be concerned about removing.