Q: A good rule of thumb is to change 20% of the water in the tank every week. If you use tap water, let it sit for two days after adding dechlorinator. This allows it to reach room temperature and let the pH settle, which helps the water not shock the fish when it is poured into the tank. The dechlorinator removes chlorine to minimize stress. You can also add a stress coat to the water, which can prevent diseases in fish. You can also buy a device that hooks to your faucet that vacuums the gravel while removing and replacing water. You don't have to wait a few days if doing it this way. Just make sure you make sure the temperature is close to your tank's temperature and that you add in a chlorine remover. You must keep your filter up and running. The filter helps keep your tank healthy and prosperous, so neglecting it can lead to cloudy water or even fish death. Read the instructions for your filter to know how to take care of it. All filters need to be examined weekly. Check them weekly for any blockages or build up. Clean as needed. When cleaning the cartridges, use tweezers to remove fish waste or other blockage. Do not rinse the cartridges, as this removes bacteria that lowers the ammonia and nitrites. The bacteria will look brown when it grows on the filter. Read the instruction manual that came with your pump to make certain it is properly installed and working as it should. The pump is important in aerating the aquarium with oxygen from the air. If it is not working properly the fish will suffer especially if the water is cloudy from waste matter.
A: Change the water. Keep your filter clean.

Article: The temperature you choose depends on your preference and the size and dryness of your flowers. For instance, 105F (41C) is a typical temperature for average-sized flowers. Generally, you can't go wrong by using the lowest temperature setting on the dehydrator. Lower temperatures may take longer, but will dry the flowers thoroughly without damaging them. If the flowers seem small enough to fall through the gaps in the dehydrator's tray, line the tray with parchment first. To prevent the flowers from blowing out of place, put a mesh liner on top of them as well. Make sure the flowers don't overlap. Leave space between each flower so that it's exposed to as much air as possible. Check on them every 30 minutes or so. Depending on the temperature, it can take from just a few hours to one full day for the flowers to dry completely. You will know they are done once they feel crunchy and brittle. Touch them gently with your hand to see how their texture has changed. If you don't use them immediately, you can keep the dried blossoms in an airtight container, such as a glass jar, for up to a year.
Question: What is a summary of what this article is about?
Preheat the dehydrator to your desired temperature. Lay out the flowers in a single layer in the dehydrator. Leave them to dry. Check to see if the flowers have completely dried out. Store your chamomile in a dry place.

Problem: Article: Plant posts about 6 feet (1.8m) tall adjacent to each erect plant, with a cross-bar about 3 feet (0.9m) long, placed about 3 or 4 feet (0.9 or 1.2m) high on the post. As the canes grow up, you you can train the primocane suckers (new growth) around the post to help support the weight of the canes, leaves, and berries. Erect and semi-erect blackberry varieties will mostly grow straight up, sometimes quite high. To promote growth, it's important to use a post-system of trellising, as you would roses, or another snaking vine. You want to give the blackberry something to climb on. Typically, you won't need to train or trellis erect plants in the first year. Blackberry posts don't need to be elaborate. Plant along existing fences, or use old fence posts to support blackberry. Ideally, posts will be about wrist-thick, so 2 x 2 boards would work fine. When planting trailing varieties, it's important to give them a horizontal avenue on which to cling. Plant 46 foot (1.21.8m) high posts every 5 or 6 feet (1.5 or 1.8m) along the row, then run two rows of fence wire between the posts, one at the top of the post and one about a foot off the ground. It's also possible to use twine, string, or wood to connect each post to the next. Use whatever materials you have on hand to let the blackberries climb on. Ideally, trailing blackberries will spread in two rows, one higher and one lower, along each wire. With proper pruning, you can train new hardy growth along the trellis and cut back less-vigorous shoots. Keeping the plants trimmed will promote fruit growth and overall plant health, allowing water and sunlight to reach the most healthy cane. Pull weeds that grow around the blackberries and continue watering the plants weekly as the seasons change. You should see leaves and maybe some blossoms in the late spring, or you might not, depending on the climate and variety. Canes and new shoots should be significant, though you probably won't get any fruit. In the late spring, cane should be shooting aggressively and you can practice training it out along the trellis if you want to, or support it with the post. In general, though, you shouldn't worry about cutting anything back, because you won't get any fruit, so you want to let the plant establish a solid root system. In the winter, after your first season, you can cut cane back to about 4 feet (1.2m) tall and 2 feet (0.6m) wide, to let nutrients move back down to the roots. Depending on the kind of growth you got during the season, you can winter your plant accordingly. Winterizing blackberry is discussed in the following section. Unburdened shoots will put on more fruit than the same shoots in a cluster of bramble. It's to your advantage, whatever the variety, to prune the blackberry regularly. When your plant is ready to put on fruit, take action to keep the most hardy shoots healthy by cutting back new shoots from the base of the plant. Train the most blossom-laden shoots along your trellis system, or up the post, and cut back new growth that will sap water and sunlight from the healthy shoots. Don't be afraid to aggressively cut back blackberry. Over-burdened bramble systems won't put on as much fruit in the same amount of space as a tamed and well-pruned plant.The plant will come back just as aggressively, if not more so next year, so feel free to really hack it back. It's very difficult to kill a healthy plant by pruning aggressively.
Summary: Install a post system for erect plants. Install trellis wire for trailing blackberries. Weed the ground and leave the plant alone during the first season. Prune away aggressive new canes during the second year growing season.

Q: Test gold with a magnet. Gold does not have magnetic properties. Test gold with a fine steel file. Gold is easy to file, but the file will bounce off of other metals. Purchase acids for testing. Follow the instructions on the package to test the gold for genuineness, testing in an inconspicuous spot to prevent visible damage. You can find the daily market prices of gold on many brokerage websites. You will need to purchase a jeweler's scale that weighs gold according to pennyweight (1/12 of a troy ounce) rather than simply weighing gold in grams. Many customers are happy to sell their gold jewelry and coins to a respectable dealer. Many dealers at a trade show will give a price break to someone who is just getting started in the business. Large volume purchases tend to have a lower price per ounce.
A:
Learn to test the quality of gold. Follow market prices. Obtain a scale. Buy gold from customers. Purchase gold at trade shows. Purchase gold in large volumes.