Ok I have always just watered my plants with aged tap water without worrying about pH, but I'm wanting to do a better job now. So I was looking at some pH lowering stuff and was wondering if the pH down solutions used for hydro reserviors would be ok to use to lower the pH of the water I'll be watering my soil plants with? I'm guessing that it will work just fine, but would like to make sure that there isn't something better out there I could be using.