Your fish tank should hold about 1 gallon (4 L) of water for each shrimp. No matter how many you have, ghost shrimp will be most comfortable in at least 10 gallons (40 L) of water. If you have to keep your shrimp in a tank smaller than 10 gallons (40 L), allow 1.5 gallons (6 L) or more for each shrimp to make up for the small space. The hardest part of breeding ghost shrimp is keeping the young shrimp alive. If you let the eggs hatch in the same tank as the adult shrimp, the young could be eaten by the adults. This second tank doesn't need to be as large as the first, but a larger tank will give the young shrimp the best chance at survival. Filters are necessary to keep aquarium water clean. Most filters suck the water in to clean it, but these can kill the tiny ghost shrimp young. Use a sponge filter instead to avoid this possibility.  If your tank is larger than 10 gallons (37.9 L) and contains fish as well as shrimp, you should use a hang-on or canister filter to provide better cleaning. Never use anything besides a sponge filter for the breeding tank. If you don't want to buy a sponge filter, you can cover your filter's water intake with a sponge or a piece of nylon stocking. Alternatively, if your filter intake is too weak to suck in adult shrimp, you can disconnect the filter before the young hatch and replace 10% of the water volume in the tank every day until the young are fully grown and you can turn the filter on again. Like most aquarium pets, ghost shrimp need air pumped through the water in order to breathe. Without an air pump, the water will run out of oxygen and the shrimp will suffocate. Sand or light gravel will keep the shrimp transparent, while dark gravel will cause them to develop small specks and make them more visible. Pick any color and type you like. For additional detail in setting up a freshwater aquarium, see this article. Many places treat tap water with chlorine, so treat it with a dechlorinator or chloramine remover to make it safe for animals. At the very least, leave it out for 24 hours before adding the shrimp so some of the chlorine will evaporate. This is the broad range of temperatures ghost shrimp are comfortable in, but many people prefer to stick near the center of this range. Put a thermometer in the tank to check the water temperature, and use an aquarium tank heater if you keep the shrimp in a cold room. Ghost shrimp feed off the debris that falls from plants, but you can keep them with just store-bought food if you'd prefer not to deal with plants. Aquarium plants with fine, thin leaves are the best to use, such as hornwort, cabomba, and milfoil. If kept in a tank with other fish, small flower pots or other containers should be placed upside down to provide hiding places only the shrimp can enter.  For best results, give your plants about a month to stabilize the chemical levels in the tank. Sudden changes in nitrogen levels or other chemicals could kill your ghost shrimp. See this article for instructions on planting aquarium plants. Adding plants to the breeding tank in advance is strongly recommended, as plant debris is one of the few foods small enough for the shrimp young to eat. Many people use Java moss in their shrimp breeding tank, which may trap food debris to help the young shrimp eat.
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One-sentence summary -- Purchase a large fish tank. Purchase a second tank for breeding. Use any filter for the main tank, and a sponge filter for the breeding tank. Install an air pump in each tank. Cover the bottom of each tank with sand or gravel. Fill the tanks with appropriate water. Keep the water at 65-82º F (18-28º C). Add live plants and hiding places.


Making a paper model is similar to making the clay model, except your layers will be made using different sized circles of construction paper.  The finished size of your paper model depends on how large you want to make it. Using a compass to draw the circles is an easy way to make perfect circles and easily vary the sizes. If you don’t have a compass, you can find 5 circular shapes to use as stencils for each layer of the Earth. Use textured paper to make your model stand out.
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One-sentence summary -- Gather the necessary materials.


Use a cotton ball soaked in nail polish remover to take off any nail polish currently on your nails. Simply rub each nail with the cotton ball until all of the polish has completely dissolved. In order to fully treat yellowed nails, the nails themselves have to be bare, with no layers of polish or varnish. Once all nail polish is removed, you can fully see the stained areas of your nails. Use a fine grit buffing board to lightly sand off the topmost layer of each of your nails. Gently rub the buffing board on the surface of your nail, moving the board straight back and forth, perpendicular to your nail. This light buffing can remove the top, stained layer of your nail, while exposing your unstained, clean nail underneath.  Rotate your nail to the left and right to make sure you’re also buffing the sides of your nail, not just the top, middle section. Only buff each nail for about 10 seconds. You want to be careful not to remove too many layers of your nail. Cut a lemon in half and rub the inside of the lemon onto your nails. Focus on rubbing the lemon on each nail for about 30 seconds to 1 minute. Once all of your nails have been rubbed with lemon, allow your nails to absorb the lemon juice and dry for about 10 minutes. After your nails have soaked in the lemon juice, apply a moisturizer to your hands and nails to prevent them from drying out.  The lemon juice can lighten your nails much in the same way it can lighten hair when it is sprayed on and exposed to the sun. You could also squeeze lemon juice into a bowl and use a cotton ball to apply the juice directly to your nails. Mix 1 teaspoon of hydrogen peroxide with 2 ½ tablespoon of baking soda until you have a paste-like mixture. Use an old, soft bristled toothbrush to apply and rub this paste onto your nails. Rub your nails with this mixture for approximately 2-3 minutes, and then rinse it off with clean water. Be sure to moisturize after using this solution. The hydrogen peroxide will dry out your hands.  Consider adding a few drops of lemon juice into this paste to give the mixture even more whitening power. Alternatively, you could also create a soak by adding the hydrogen peroxide and baking soda mix into about 1 cup of water, and soaking your nails for about 5-10 minutes. Apply a thin layer of toothpaste containing hydrogen peroxide to all of your yellowed nails. Use your fingertips or a old, soft bristled toothbrush to rub the toothpaste all over the surface your nails. Allow the toothpaste to sit on your nails for approximately 10 minutes, and then rinse off the toothpaste with clean water. After rinsing off the toothpaste, apply lotion to your hands and nails to keep them hydrated. Drop 2-4 dissolving denture cleaning tables into a bowl of water, and soak your nails in the water for approximately 15 minutes. After 15 minutes, use a paper towel to dry your hands, and then rub on some lotion. You can soak your nails in this solution a couple times a month, but be sure you soak then when your nails are bare, and free from nail polish. If your nails are yellowed because of a nail fungus rather than constant use of nail polish, tea tree oil can help with the discoloration. Apply a couple drops of natural tea tree oil to each nail twice daily, and use your fingertips to massage the oil to all parts of your nails. Tea tree oil is a disinfectant and naturally fights fungus, which could help combat the yellowing of your nails. If you nails are severely yellowed, or the yellow coloring doesn’t improve with any of these methods, you might have some sort of nail infection or yellow nail syndrome. A medical professional will be able to properly assess your situation, and may prescribe a medicated cream or supplements to treat your yellowed nails. Zinc supplements are commonly used to help treat yellowed nails.
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One-sentence summary --
Remove nail polish. Buff your nails. Rub lemon on your nails. Scrub your nails with hydrogen peroxide and baking soda. Apply whitening toothpaste to your nails. Whiten your nails with denture tablets. Tea Tree Oil. Consult a medical professional.