We have really bad tap water here so we have chosen to go the natural route with lowering the PH a little bit. Ours can get as high as 9 on a bad water change so we have added Peat Moss to our substrate and in our homemade panty hose filter cartridges we make for our tank. Peat Moss is a natural not chemical way to slowly stabilize your PH. It won't effect it do badly that it will hurt your fish, just enough to being it down enough to be comfortable for you as the owner and worry wort (myself obviously).
We also added a piece of Mopani Driftwood to each tank as it is also a natural way to control the PH. Since we made the changes our PH is all our tanks with these 2 are comfortable 7.2 to 7.8 which is much better than the 8.2 to 9 that we were seeing.
The drift wood we soaked in Extremely hot tap water for about 2 weeks, after the water went cold we poured it out and re-filled with hot water and although it still leeches a little tannins (brown) into the water it's not to dark to be annoying to me. I've seen tanks that look lovely with really dark water but I don't want it to be so dark it hurts my heavily planted live plants.
Those were the 2 easiest ways we found to naturally balance our PH. Chemicals to balance PH are a never ending cycle and are to easy to swing it badly and kill your fish - we didn't want to take the chance.