I feel like when I first got my (vitalink) ph down a year ago, it was a matter of adding a few drops.
Over time the amount of 'drops' seems to have increased... doubled, maybe. Now I'm full on squirting into the mix.
Is it losing potency somehow?
I know that one time I left it overnight with the lid off... I dunno if that wrecks the stuff... however the potency seemed to be slowly decreasing up til that point anyway.
I don't know if I'm imagining it/theres another variable, or whether my vitalink is just going bad?
If so, would all brands be the same?
Cheers
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