[leebca]

You can take some pure water (if your system needs water to add-back for evaporation) or salt water from the QT and add some (0.5 lb per gallon or around there) of the pH adjusting powder to it. This 'pH+ adjusting fluid' is added on an as-needed basis, in the amount needed. If pH is dropping a lot, make a stronger solution. This adjusting fluid can be drip added, too.