In all there are more than 20,000 types of fish. There is virtually no way possible anyone can outline how to care for fish and aquariums in a single group of articles.
About the best that anyone can do is give you a few basic concepts, care instructions, etc, and allow you to go from there. Since aquariums, rather water and fish produce toxins you will want to learn about such toxins in aquarium and fish care.
Aquariums are containers which provide fish a habitat filled with water. Aquariums are often shaped like boxes, which fish and related aquatic animals, as well as plants are stored. The water supplies oxygen and/or air for fish to breathe, which means the water must be constantly maintained in order for the fish and plants to survive.
