Freshwater fish are a good choice for an inexperienced aquarium owner because there is more wiggle room in the water specifications. Some freshwater fish have a variation of as much as ten degrees of acceptable water temperature. Conversely, most tropical fish will only allow about two degrees of variation in water temperature It is not uncommon for the novice fish keeper to become easily discouraged. Aquarium Fish Care- All About Start Up Okay so you have decided that you want to own a fish tank. Great! All you need to do is go to the pet store and pick out a tank and the prettiest fish in the store, and you are ready to go right? Wrong! Starting up an aquarium is a process. It takes time and a lot of patience. The decision to use live plants should be a primary one and steps need to be taken to prepare the tank for later use. It is suggested to add all your plants in the beginning and let them become established. By doing this, you will eliminate the chances algae utilizing the nutrients added and the extra lighting. If you don't already have a stand or a suitable replacement, keep in mind that you will need to purchase one. You will need a heater for temperature control, and a thermometer for checking the water temperature. It will take approximately five bags of rock or other substrate to line the bottom of the tank. you're almost there! During the eighth week, you can add Aquacultured Coral such as Pumping Xenia, Starburst Polyps and Spaghetti Finger Leather Coral to name a few. Place these corals into the live rock as you did with the previous set of coral. Now you have succeeded in creating your reef aquarium. The types of aquariums that house these very large fish are usually public state supported aquariums. These facilities have the resources to build large enough tanks to house the sharks. Sand sharks can be kept in a tank with other large fish. The sharks are usually fed three to four times a week to discourage them from eating tank mates.