No, it isn't. Neither is distilled.Is R/O water good for Organic soil?
Both are pretty much *dead* water and really don't do all that well with a living organic soil.
The tap deal depends. I keep about 40 gallons sitting out for 'spot' watering, but to water everything takes better than 1/2hr with the hose. IDK, 100 gallons+?
I have noticed NO difference in my micro herd from the tap to the water that has been 'aged'.
YMMV
Wet