baking soda and vinegar are the common and most recommended pH up and down DIY additives.
couple drops tends to work for a gallon or two... but the solutions vary soooo much the only way you can tell is to mix up a few trial batches and see what you get.
BTW, you have to pH test every time you water. there is no stability to be had in municipal water... and most bottled water is from municipal water supplies
couple drops tends to work for a gallon or two... but the solutions vary soooo much the only way you can tell is to mix up a few trial batches and see what you get.
BTW, you have to pH test every time you water. there is no stability to be had in municipal water... and most bottled water is from municipal water supplies