Rust spots appearing during flowering

You're right about it being a solvent that will pull minerals and salts out of the soil, but for that reason it's not a good choice for growing plants. I know a ton of people think differently, but this interview convinced me to just use tap for horticulture:

I don't think i'm saying its a solvent or that it pulls minerals out of the soil...(?) just that it takes on the surrounding ph since its basically inert.. then again maybe that's what you're saying in a different way LOL
But yeah, Ive used both... my area has a lot of chlorine.. and the water is hard.. in the 550 range... I will use a boogie blue charcoal filter and use tap water minus the chlorine but its easier to just get 5 gallons from a glacier machine rather than filter 30 gallons of water and bottle it all.. I also use filtered tap water in the outdoor garden for vegetables and it doesn't seem to have a negative effect. My soil mix has all the needed minerals in it, so just regular old purified water works pretty well.. but yeah.. tap water is cheaper, I just wont recommend it to a new grower, best to rule out the water as a possible cause of any issues imo.. But in this case.. im pretty sure its the layered NLS with coco that's throwing everything out of wack so the water is a moot point..
 
Ro water has no buffer and will take on the ph of anything combined with it... Poured into an unbalanced soil, it takes on the ph of that soil... My point is that phing ro water or caring about the ph of ro water in an organic grow, in my opinion is pointless as the water itself will not affect the ph in the growing medium unless a buffer like salt fertilizers or a calmag supplement are added to it. I could be wrong though

to be honest,i know nothing about ro systems and buffer.
i just know my water tastes great to me.
with that said,my system has a 6th stage alkaline filter that adds ionized calcium, magnesium, sodium, potassium ion, and increases the TDS value, normally between 10-20 ppm. and ph by .5 to 1.

does this change anything here as far as ro water and no buffer.
just want to make sure this isn't overlooked .

cheers
 
ionized calcium, magnesium, sodium, potassium ion, and increases the TDS value, normally between 10-20 ppm. and ph by .5 to 1.
Thats not much.. I don't see that being an issue. Maybe the sodium if it was in higher concentrations... I think Its just the layering technique you used with the NLS.
GL
 
Yeah, we're saying the same thing basically. The reason pure H2O acquires a pH is because it acts as a universal solvent; water is the one substance known to man that can dissolve anything because it can either become acidic or alkaline depending on the minerals it comes into contact with.
 
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