Most leeches are nocturnal and don't like any form of light. Be sure to keep them in an area out of both direct sunlight and artificial light—they can harm the leeches. You can also cover your tank with a towel if you can't find a location away from light exposure. In the winter, you can place your aquarium outside as long as it is partially covered with a towel to prevent direct exposure to sunlight. When the water looks dirty or starts to smell, it's time for a change. Additionally, keep a lookout for skin, which looks like slimy, whitish-clear particles and is a sign the water is dirty. To change the water, use a bowl or measuring cup to scoop out old water from the top of the tank. After removing 25 to 50 percent, fill the tank back up.  Don't change more than 25 to 50 percent of the water at a time. Any more and you risk sudden temperature changes that can harm the leeches. Be sure to change your water at least once a week. Remember that leeches can go months—even up to a year—without eating. But for captive leeches, once a week is best. In terms of food, meal choice can depend on the type of leeches you have, so always ask your supplier for food recommendations. However, 1 earthworm per leech usually works for all leech types. Remove the dead food remains about 1 hour after putting them in the tank.  If you caught your leeches in a pond, feed them pond snails. Medical supply center leeches typically require fresh beef liver. Frogs, fish, and earthworms are great food sources for many kinds of leeches. If you're unsure, stick with one of these food sources. Don't feed your leeches in the winter.
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One-sentence summary -- Keep your tank in a cold, dark place away from light. Change tank water every 3 to 7 days or when the water gets dirty. Feed the leeches once a week.

Q: It’s at the top-left corner of Pixlr. The ″Save image″ dialog will appear. Click the ″Format″ drop-down menu to see a list of file types, then click the one you want to use. A description of each format appears next to its name.  If you choose JPEG, you’ll have the option to choose a quality level. The higher the quality, the larger the file size. If you’re not worried about file size, you can choose the highest setting. If you’ll be sharing the image with others on the web, select JPG or PNG. This opens your computer’s ″Save″ dialog. If you want to use your web browser’s default download folder, you can skip this step. This saves the file to your computer.
A: Click the File menu. Click Save. Select a format. Click OK. Navigate to the folder where you want to save the image. Click OK.

Article: With a Chicago Style citation, start off with the author's name. You will list the last name, followed by a comma, then the first name. Then, add a period. For example, "Woolf, Virginia." From here, state the title of the book. Make sure the title is in parenthesis, and follow the title with a period. For example, "Woolf, Virginia. Mrs. Dalloway." From here, you'll have to add publication details. You can find this information on the site where you purchased or borrowed the book, and it may also appear on the first few "pages" you scroll through on your screen. You should add the city, followed by a colon. Then, add the publisher, followed by a comma, and the year published. Your source would now read, "Woolf, Virginia. Mrs. Dalloway. New York City: Houghton Mifflin Hartcourt Publishing, 1953." As with APA citation, how you cite an e-book in Chicago Style depends on where you accessed the book. When working from an online database, you should either list the URL of the database or the DOI. Remember, the DOI is the series of numbers, dashes, and periods that identify a book in an online library.  If you're using a DOI, your citation may look something like, "Woolf, Virginia. Mrs. Dalloway. New York City: Houghton Mifflin Hartcourt Publishing, 1953, doi: 123.3456/2355/2345". If there is not a doi included, you can simply include the URL of the online library where you checked out the book. For example, "Woolf, Virginia. Mrs. Dalloway. New York City: Houghton Mifflin Hartcourt Publishing, www.onlinelibrary.com". If you bought a book online, or read it for free, you simply need to add the URL where you bought or read the book to the end of your citation. For example, "Woolf, Virginia. Mrs. Dalloway. New York City: Houghton Mifflin Hartcourt Publishing, amazon.com."
Question: What is a summary of what this article is about?
List the author's name. State the title of the book. Add publication details. Cite an e-book from a library database. Cite a book you found on the web.