water question

i use rainwater but had to paint my metal roof and need to use another source of water for awhile..tap water is 8.4 ph and 500 ppm. lake water ph is 9.0 and 100 ppm. which one would you use and i wonder how long i should let the corrugated metal on roof dry?...

thanks for sharing fellows.

I add Phosphoric acid to my 8.5 tap water to bring it down to the 5.7 my rainwater measures at.

What kind of paint is it?

I used my tap water (about 8.4 as well) for 3 years without any problems that I could tell. This is actually my first grow where I'm pH'ing my water. Maybe I'll be able to tell a difference, maybe not.

I noticed that my plants always looked happier after a rain so I pHed multiple buckets of rainwater and discovered they were 5.7. So now I add acid to all of my watering.

For seeds I always use 7.0 RO water.

Mohican said:

I add Phosphoric acid to my 8.5 tap water to bring it down to the 5.7 my rainwater measures at.

What kind of paint is it?

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it's an oil based roof coating,not actually paint.it looks dry but i'm afraid to try it.

dwight smokum said:

it's an oil based roof coating,not actually paint.it looks dry but i'm afraid to try it.

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I doubt its toxic, look at the base of the rain gutter, if it looks like you sprayed roundup or something then yea you got a problem, but If the random weeds or whatever at the base of the gutter are fine, then you are probably fine too.

greasemonkey i never thought about that. i've got all kinds of grass,trees,bushes, under where the runoff is.