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Hydroponics CANNA ADDITIVES PK 13/14 Plant Nutrients 5L Litre

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Ph Down with?

Hydroponics / Aeroponics
Ph Down with?
I want to try Coco and the PH I have with my Tap are 7.9. If I put lemon juice in the pH drops but hours later it's going up so that's not what I want! How I can decrease the pH for longer than 12 hours?

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