Many avid fish lovers have a passion and a strange fanatic desperation towards maintaining an aquarium. But it is not an easy task. There are many things you ought to know before you decide to take the final jump in this regard. The first question you need to ask yourself is that whether you wish to maintain a marine fish aquarium or a freshwater one. Aspects of fish aquarium you must be familiar with are the quality of water that needs to be maintained. The pH of the water must be tested before hand in order to ascertain if it is alkaline or acidic in nature. Also, you must determine if the water is hard or soft in nature. Ideally, the appropriate pH of water ranges from 6.5 to 7.5; that is it must be slightly acidic or neutral. This range could vary in case of marine water fish. They require water which is slightly basic in nature. Another important feature you must consider in aquariums is the kind of lighting you want. But too much of light could also lead to the growth of algae in the tank so the amount of light must be set in its optimum position.