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rainwater for cannabis

i use it.
untreated.
from gutter to storage drum (sheltered from elements and insects/pets,etc)
to soil.

Or sod it and use tap water because it’s just not worth it?
Am worried that I might be bringing in all kinds of crap from outside (fungus spores, mites, any other nasties I don’t want near my plants) by using rain water. If I do, what level of filtration do I need to run it through? Presumably there’s a lot more badness in there other than the visible stuff?? Does boiling ruin it?

A mate of mine said he uses rain water for his plants whenever he can – what’s the view on using it?
funny thing is.
its pH usually lands at 6.6-6.7 (slightly acidic)
straight from mutha natures tap.

the way i see it.
plants have been drinking it for millenia (albeit before human pollution)
why change what aint broke, right?
simply skim off the top letting the debris rest at the bottom.
if im feeling kinky ill add a few air stones.
. besides, its free.

i havent heard anyone have adverse effects from using it(rainwater)
(if so. move. . for your healths sake.)

A mate of mine said he uses rain water for his plants whenever he can – what's the view on using it? Am worried that I might be bringing in all kinds of…