Rainwater

I just started substituting nute-enhanced water with rainwater I collected. Seems to be working well so far, found this interesting article about the effects of rainwater on plant growth.
EO Study: Rain Helps Carbon Sink

Seems it helps the plants use more CO2. Maybe if I put it in the mister, it will increase the co2 around my plant's atmosphere.

you still need to check ppm and ph with rain water

ppm of rain water should be as close to 0 nutrient level as poss as it is distilled

should be, but with pollution in the air as the molecules fall, it's not always true.