Best way to lower PH?

Hi all, first time grower here using Plant Magic soil.

currently I’ve not been too bothered by what the PH is, I’ve got a digital tester and it’s always shown water I’m using to be around 7.2-7.5PH, however now my plants are a bit more established I’m looking to ideally watch the PH on the water I’m giving them to around 6.3 which soil prefers.

best way / product to lower Ph? I saw some PH down solution used for aquariums/fish tanks, but not sure if this would be suitable to use in water for a plant?

opinions?

Mad farmer ph down is the best I've used, very strong.

Citric acid, about $1 for a 500gm bag at your local bakery supplies store.
Sprinkle a few crystals in a litre of water, 500gm should last you around 10 years.

Buying a 'special expensive cannabis product' to lower PH is total madness.
(IMHO)

dubekoms said:

Mad farmer ph down is the best I've used, very strong.

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thanks for the advice, but I’m struggling to find anywhere in the UK that sells that, and I’m not paying for international shipping from USA because that will take ages to come.

I just started my grow and I been putting a cap of white vinegar in a gallon jug but I’m unsure if it’s bad for my plant I heard of ppl doing it and my tap water is 8 or higher, a lil cap full lowers it to about 6.5 give or take .25 since I’m using those cheap strips to check my PH