The word aqueous means pertaining to, related to, similar to, or dissolved in water. The world's oceans consist of salt (NaCl) and other trace elements dissolved in water (H2O).
Articles About Aqueous:
Water Changes - The Best Medicine for your Saltwater Aquarium? Are they? Or are there better methods to accomplish the same goal?.
Tap Water Purification Methods
Methods for how to purify tap water before using as make-up or top-off in saltwater aquariums, as well as a list of other alternative fresh water sources one can choose to use instead.
pH & Alkalinity Simplified
To control or adjust pH, one must first understand what it is. In order to keep this discussion fairly basic, we won't get into the interactions of ions on a chemical level that make it all happen. Here we will just discuss what happens on a layman's level.