m is by doing partial water changes on a regular basis (Paletta 3). Replacing 10% to 20% of the water every month is an ideal way to keep nitrate levels low (Paletta 3). This also will eliminate other harmful chemicals from building up, such as phosphates. Phosphates within the tank can quickly cause algae to grow over everything within the tank. The hobbyist can had certain chemicals to rid the aquarium of the harmful chemicals, but experience has shown that the added chemicals can cause harm for certain tank inhabitants (Walker). Although these are the main chemicals the hobbyist must watch out for to keep from killing the tank inhabitants, there is one other chemical that requires a constant watch. To promote healthy growth, calcium levels in the water must also be watched. Calcium is primarily a self-replenishing chemical; the rocks and sand in the aquarium contain calcium, and as this material slowly dissolves the level of calcium will be maintained. However, in aquariums containing high amounts of live corals, the calcium may be depleted faster than it can be replenished (Goldstein 21). In these cases, the hobbyist must add calcium supplements to his or her aquarium. “Apart from good water conditions, the single most important factor in the success of any aquarium containing photosynthetic organisms is the quantity and quality of the light provided” (Tullock 105). There are a variety of options for the hobbyist to consider when it comes to lighting his or her tank. At first this might appear to be an easy subject. Put the aquarium under a window so it will receive natural sunlight, or place a few light bulbs from a hardware store over the top of the tank. Both methods would be a drastic mistake. First, direct sunlight would cause a tremendous growth of algae, much like algae will grow in a pool or pond. Secondly, normal light bulbs put out a frequency of light that is suited for human eyes ...
