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im curently trying fresh lemon juice as ph down , i have better results when leave tap water for 24 ours to declorinate. my tap water ph :7,4 and need about 0.4 ml of lemon juice to bring it to 6,2 . also tested 6 hours later and ph went to 6.4-6.5 . after 12 h same ph. if i dont leave tap water...