Problem: Article: Fiddler crabs live near bodies of water, so you'll want to set up something as close tot their natural habitat as possible. Get an aquarium of at least 10 gallons to accommodate your fiddler crabs. Buy an aquarium tank commensurate with the number of fiddler crabs you'll have. For example, if you have four or less animals, a 10 gallon tank will work. However, if the animals are larger or you have more than four, get at least a 20 gallon tank to avoid hostility between the crabs. Get the biggest tank you can afford at a pet store or large retailer. You can also often find them second hand, though you should wash these before using them. See if the tank has a tank screen for the top because fiddler crabs can climb and escape. Crabs are more active when their environment is warm. However, direct sunlight can kill fiddler crabs, so you want to put the aquarium in a warm spot out of the direct sun. Find a spot that has a relatively consistent temperature of 68 to 77 degrees Fahrenheit (20 to 25 Celsius). Use a thermometer on the aquarium if necessary. Make sure the aquarium isn't exposed to radiators or heating devices or drafty areas of your home. Although there is differing consensus on how much sand to add to your aquarium, keep in mind that fiddler crabs are semi-terrestrial and like to burrow. Fill the aquarium with at least a few centimeters of sand so that your crabs feel comfortable. Try starting with 4-5 centimeters of sand in the aquarium. Add more if you have multiple crabs or want to give your crabs more space to burrow. Use aquarium, play, or bio sand to fill the tank. Pile most of the sand on one side of the tank until you get to the level you like. You'll need to add a small amount of water to the tank to mimic the fiddler crabs natural brackish-water habitat. Either add a small bowl of water or pour water directly into the tank. Fill the tank with 1.5-2 liters of brackish water. Make brackish water by mixing 1.5-2 liters of dechlorinated water with 1 gram or teaspoon marine salts. Remember that chlorine can cause stress and kill fiddler crabs. Choose whether you want to fill the bottom of the tank with the water or if you prefer to put it in a small glass or plastic bowl that is flush with the surface of the sand. Be aware that you want to keep the water as clean as possible because you'll add your crabs food to the water. Recognize that the water and sand mixture may appear brown and cloudy. This is normal and because it will settle throughout the day. You may want to place some decorations or plants in your tank. Fiddler crabs like to hide when they are scared or when they are molting, so placing a few decorations in the tank may make them more comfortable. Add plastic plants or sticks because fiddler crabs will often destroy live plants. "Driftwood" types of sticks and rocks are good choices because they let your fiddler leave the water, which is vital to their health. Consider adding a piece of PVC piping for them to climb and hide. Make sure to rinse the piping out well before placing it in the tank.
Summary: Purchase an aquarium tank. Place the tank in a warm spot. Add sand to the aquarium. Fill the tank with water. Decorate the tank.

Problem: Article: Using a sharp knife, cut the fennel into very thin,14 inch (0.64cm) slices and set aside. Add 1 cup (240mL) of white wine vinegar, 1 cup (240mL) of water, 14 cup (59mL) of sugar, and 2 tablespoons (30mL) of coarse salt. Continue to boil the ingredients until the sugar and salt are completely dissolved. Experiment with adding additional flavors like orange or peppercorn, or find a recipe online for other options. Do not cool the liquid completely. It should still be warm when you begin the next step. Allow the fennel to steep in the liquid for about 20 minutes. Use it immediately, or place it in canning jars to store it for up to 1 week in the refrigerator. Use the pickled fennel as a topping on salads or meat dishes.
Summary:
Cut a fennel bulb into thin slices. Combine pickling ingredients in a small saucepan and boil. Allow the liquid to cool for 5 minutes. Add the fennel.