Vinegar will lower your pH, it is acidic.BRNEYDBVR said:I use lemon juice to ph down. White Vinegar for ph up.
Vash said:I'm about to start using PureBlendPro with a PROMIX soilless medium. From the research that I've done, no mention has been made of adjusting, or having to adjust the pH. My question is if there's a need to adjust the pH, what's being used to adjust it?