Dip a clean cloth in warm freshwater and scrub it over the inside of the tank. This will remove any dust or dirt that has seeped into the tank while on display or at the manufacturer. Don't use chemical cleaners on your aquarium. They can leach into your water and harm your fish. Live sand has bacteria and tiny invertebrates in it, which help to naturally filter water and make the aquarium a more hospitable environment for your fish. Live sand also looks just like regular sand, adding a natural look to your aquarium. You can buy live sand online or at your local pet store. You can buy pre-mixed saltwater mixtures online or in most large pet stores. These solutions are ready to be poured straight into your aquarium, with no other mixing and prepping required. Make sure to read the directions before you use the saltwater. Check your tank's volume and buy enough saltwater to fill it up completely. Most saltwater aquarium owners choose to make their own saltwater by adding a mix to filtered tap water. You can buy saltwater aquarium mix online or in pet stores for a cheap price, and save it to use again when you need to replenish your tank. Consult the directions before you start setting up your tank to make sure you don't have to take extra steps for your brand. Run your hands along the outside edges of the tank and look carefully at the area around it. If you don't see or feel any water, you can continue filling up the tank slowly. Set a small bowl in the tank and pour the water directly into it, instead of onto the sand, to keep your sand in place. You may want to pour in sink water from a bucket, rather than holding your tank under the sink or filling with a hose. If you do feel a leak, dump out the sand and water and return the tank. Water conditioner is a specially formulated liquid designed to remove heavy metals, chlorine, and/or chloramine from your sink water, making it safe for your fish. You can add the conditioner after you've poured your water into the tank. If you're using a bucket, mix it there beforehand. Read the package instructions before you use your conditioner. Buy a water conditioner at a pet store, or search for one to buy online. Check the directions on your packet for a salt mix per gallon specification. Start stirring in your salt mix bit by bit. Use a hydrometer or refractometer to measure your tank's specific gravity, which is an indirect measurement of its saltiness. For a fish-only tank, you should aim for a specific gravity level of 1.017-1.021. Hydrometers are small, plastic measuring devices that you can buy online or in a pet store. To use, dip the hydrometer in the tank for a water sample and take a reading from the marker. If your specific gravity is too low, add a bit more salt. If it's too high, dump out a bit of water and replace it with filtered fresh water. Once you've reached the right specific gravity, follow the directions on your powerhead, or filter, to place it on the side of the tank. Slip your submersible heater in as well. Plug in both devices to start circulation and heating. If possible, place the powerhead so that it makes a bit of turbulence on the water's surface. This encourages the best possible gas exchange. Your water is almost ready! Let the tank sit for 1-2 days, giving the salt time to dissolve and letting heater get the tank to your desired temperature. After a day or so, test the specific gravity again to make sure it's still at the right level. Add more salt mix or freshwater to adjust the specific gravity. Check the temperature as well, turning the heater up or down as needed. Place 1.5 pounds (0.68kg) of cured live rock into your tank for every gallon (3.8 L) of water. This kind of rock is the best natural way to "cycle" your aquarium, or create a bio-filtration system. Cured live rocks introduce good bacteria to convert ammonia, which will be produced by your fishes' waste and respiration, into less harmful compounds. Look for cured live rock online and in pet stores. The rocks also function as an ammonia source for bacteria to work on. Their porous surfaces, meanwhile, give this bacteria a great home to grow in. While your aquarium is cycling with the cured live rock, all you need to do is keep an eye on its progress with ammonia, nitrite, and nitrate test kits. Test your tank at least once a day.Your tank is done cycling when nitrate is present and the ammonia and nitrate levels are too small to be measured. Buy good test kits online or in home improvement stores. Throughout the course of the cycle, you'll see the ammonia and nitrite levels increase and then drop down, along with an increase in nitrates. If you want to decorate your tank any more, now is the time! Place rocks, fake plants, or any other features that you want to add. Make sure they're safe for saltwater environments. Clean off any new features with a clean cloth and warm freshwater beforehand.
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One-sentence summary -- Clean your empty tank with a cloth and freshwater before you add anything. Pour in 23 inches (5.17.6cm) of live sand. Use pre-mixed saltwater for a simpler set-up process. Create saltwater with a synthetic sea salt mix for a cheaper set-up. Fill the tank a third of the way and check for leaks. Pour in a water conditioner to filter out metals and chlorine. Add small amounts of salt mix until you get to the right specific gravity. Place your powerhead filter and heater in to start circulation. Let the saltwater circulate and heat for 24-48 hours. Add cured live rock to "cycle" the tank. Test your aquarium's ammonia, nitrite, and nitrate levels with test kits. Add saltwater rocks and features to decorate your tank.

This first rectangle will be the frame of your house. The exact proportions of the rectangle don't matter, but try not to make it too long and thin or your house might not look realistic. Use a ruler or straightedge to draw the rectangle so all of the lines are neat and straight. The base of the triangle should line up with the top of the rectangle. Make the triangle wide enough that the bottom corners extend past the sides of the rectangle. The triangle should be around the same height as the rectangle. If you make it too tall it won't look realistic. To make the chimney, draw a tall, narrow rectangle that extends up off the left side of the roof. Then, draw a smaller, horizontal rectangle on top of it. To make the roof panels, draw evenly-spaced horizontal lines from one side of the roof to the other. The number of panels you draw doesn't matter, but try to keep the space between each panel the same.
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One-sentence summary --
Draw a rectangle. Sketch a triangle on top of the rectangle to make the roof. Add a chimney and some horizontal panels to the roof.