heres some good info on achieving proper ph without using ph up or down just keep your fungi /bacteria ratio correct
More fungi=acidic(Fungi excrete acids in order to unlock certain nutrients in the medium). More bacteria=alkaline(basic)(Bacteria excrete alkaline slimes to bind soil particles and create a friendly environment). As a result Bacteria/Fungi balance each other out. Different ratios of the two different types in turn mean a different PH. In turn you can say that plants who prefer a lower PH prefer a higher count of fungi/bacteria where ass plants who prefer a higher PH prefer a higher count of bacteria/fungi.Fungi don't multiply in tea's they merely grow bigger where as the bacteria multiply very fast. That is why the PH of a tea usually raises very fast after 12-24 hours. Adding molasses helps feed the bacteria and fungi, but more so the bacteria because they love eating simply easy to digest sugars where fungi love things that are harder to digest.