So 3 weeks after the plants sprouted i was finally able to pH the water... turns out that it's between 7.5-8.0, closer to 8 which isnt too good at all.. is there any household item i can use like vinegar to bring the ph down or do i have to go and buy a chemical from some shop, etc.. would i want the pH to be at about 6.5? (soil grow)

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anyone know?

yes it's true but I would only use it in an emergency. Lemon juice is good. Phosphoric acid is ideal, as it is also a major nutrient required for growing (the P in NPK) Alaska Mor Bloom fertilizer (0-10-10) is Phosphoric Acid & Potassium Chloride.

yes you can. as it breaks down it is used by the plant.

This may be sufficient if you use a municipal water supply, i.e. it's been treated and isn't really hard. I get my drinking water from a well and it tastes great, but after struggling with nute lockout issues for a long time, I opted to get RO water for most of the grow. I will use pH balanced well water toward the end of flowering and as a flush since we're trying to force the plant to use it's stores anyway.

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White vinegar - down... baking soda - up if you can't get proper up/down.. Luck.

What ratio should i add the vinegar to my water to bring it down say half a point

to bring it down
vinegar
lemon juice
mollases

also most nutes will bring it down when you add them

if your going vinegar apple cider vinegar is best

my tap water is 7.3 I use a brita filter pichter for drinking water and water ran thru it comes out 6.5 so highly recomend the brita filter

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Lol here you are again.....im gonna try the brita when i get off line it seems very promising.