While having an advanced understanding of chemistry helps with keeping aquariums, it’s definitely not required to keep fish happy and healthy. In the same sense, having some basic understanding of some of the chemical properties of water and the things in the water can really go a long way when keeping fish. For example, many people are familiar with pH as a measure of water, but what is it exactly? What makes water hard or soft? In this section, a few key water parameters and chemicals will be covered. Embedded is a video I made that explains most of these concepts in a more presentable way.