A regular cleaning tool will not be strong enough to remove the algae from the glass. It is very important to aim the filter head down into the water. Failure to do so will result in a build up of salt on the lid of the tank. Good lighting and a strong and efficient filter are a necessity. The tank should only be lit for about 6 hours a day. Many types of gravel and sand are available in a lot of colors. You can add accent plants as well to make it appear more natural. Many people add little figures or signs to personalize their aquariums. It's all up to you in regards to d cor. Be sure to buy a net, an algae scraper and conditioner for the water. Aquarium Care for Sand Sharks Sand sharks are viewed as the most timid and least aggressive of the shark species. Sand sharks are usually smaller in size than other sharks and move fairly slowly. These sharks are found all over the Atlantic Ocean, and are the most common type of shark. Although these sharks would seem to be the perfect aquarium kept fish, because of their smaller size, they are not. Always remove decaying leaves as they tend to drain the nutrients out of the healthy parts of the plant. Dying roots will rot beneath the gravel. Be sure to remove any part of the plant that is dying or appears diseased. Many plants that are seeded into the gravel will reproduce. The new plant growth can be removed and planted in another part of the aquarium. Generally, the water and the fish in the tank will provide the nutrients and fertilizers needed for plant growth. It is rare that any supplements will need to be added. One important factor in having healthy plant life is your filtration system. Stay away from under gravel filters because they produce a steady flow of bubbles that disturb the surface. As you can see, there is very little wiggle room associated with these measurements. It is extremely important to check the levels daily, or the results could be costly. These invertebrates are not compatible, however, with their food source needs. Check with the supplier for compatibility before combining tropical invertebrates.