Q: For lots of people, the teenage years are full of worries—stop paying so much attention to them! Many worries are based on what other people think (e.g., "What if they don't like me after this?" or "What if my mom gets mad that I don't study medicine like she wants?"), rather than what you think. Go ahead and do what you want to do, without factoring in the opinion of others; dye your hair a wacky color, wear what's comfortable and not what's trendy, call your crush, choose your own path in life, and don't worry about what others think of your choices! At the end of the day, it's your life, so live it the way you want to.  Of course, there are some limits to this. You may want to speak your mind, for example, and it's okay to have your opinions, but you don't want to offend people or start an argument in an inappropriate place. Some social rules, such as not hitting annoying people, are important to follow. Learn when it's important to listen to social rules, and not what you think. When you were younger, people always told you to find hobbies, and chances are, you have at least a few basic interests that you can engage in. Use these to your advantage. Can you pick something you want to practice and dedicate more time towards (e.g., playing an instrument), or delve into a subcategory of your interest (for example, moving from simple writing to writing poetry or literature)? Don't be afraid to try new things. It's never too late to check out a new interest, and, who knows, maybe you'll even find your life passion by doing so!   Consider "balancing" your interests so that you have a wide variety. For example, if your biggest hobby is computer programming, maybe try a more art-oriented hobby like painting, or learn a language. Just because you're a "tech nerd" or an "art geek" doesn't mean your interests have to stick firmly in that area. It's boring to have interests that are only in one area. Explore your style and your interests. Now is the time to experiment; don't feel the need to stick to just one niche. From fashion to hobbies to music and movies, you can explore all kinds of possible interests. Don't feel bound by tradition or labels: if you like to dress like someone who likes rock music, and you really love country music, that's fine. Do what you enjoy. Even if you think you're not prejudiced, sometimes negative thoughts about groups of people can root in your mind. Buried prejudices against religious groups, racial groups, LGBT groups, and so on, can taint your ability to see the world clearly; let go of these. Nobody is exactly like a stereotype, and seeing groups of people as "just like those other ones" inhibits knowing people for who they truly are.  On a smaller scale, stop thinking badly about people you've had bad experiences with. Unless this person has caused you physical and/or mental harm, they're probably not as bad as you think they are. And if all you know about this person comes from outside sources and not the person themselves, you don't even know if those rumors are true! You don't have to be BFFs with them, but be civil and respectful to them; maybe even try being friendly. They might surprise you and be much different than your image of them! Yes, school can be very hard work, but in your teenage years, it matters more than ever. What you accomplish in your teen years may determine in large part your opportunities in your adult life. Dedicate some time to studying and do your best to do well in middle school and high school. Aim to get things done as soon as possible instead of procrastinating. Learn how to prioritize, whether it's with school, work, or any extracurricular activities you may be involved in. Boost your studying skills (and even make it fun!). It may not seem enjoyable, but it's helpful later on in life, and some teens—not only the nerds—do find it enjoyable!    You don't have to be an all-A's student that's taking only Honors or AP-level classes, but you should at least do your best to pass the classes you're in. Avoid slacking off, as this hurts your grades. Don't rush on your homework because you want to hang out with friends—work on it to learn new things. A largely forgotten fact is that school is meant for learning, not trapping you in a classroom for a few hours each day. Your teenage years are hectic, ever-changing, and chances are, your interests will constantly shift and change. Nothing about yourself is set in stone, even at the end of your teenage years. You will continue to grow and develop as a person as long as you're alive. There's no need to figure yourself out and decide what you are at your age. Anyone who tells you that you need to figure out what college you're going to or what you plan for the future is wrong. Even if you think you've decided on what you're going to do, don't be surprised if your plans change—you never know where life is going to take you.
A: Develop your sense of self, focusing more on your own thoughts and goals, instead of what other people think. Discover and engage in your interests. Let go of your prejudices. Work on your work ethic. Avoid rushing to figure out who you are.

Q: In addition to monitoring and regulating ammonia levels, there are several things you can do to keep your aquarium healthy. Make it a habit to care for your tank water regularly. For example, you should check the water temperature every day.  On a weekly basis, replace 10% of the water with dechlorinated water.You should also test your water for nitrates and ammonia weekly. Each month, change 25% of your water. You should also perform any necessary filter maintenance. On a monthly basis, scrub the algae from your tank. Prune live plants if you have them. Write down your maintenance schedule on your calendar so that you keep track of each of your steps. Part of maintaining a healthy aquarium is to provide the proper amount of lighting. Most fish need 8-10 hours per day. Make sure that they are getting the correct amount of light.  You can purchase lights with timers for your aquarium. This will ensure that you are not over or under lighting them. Practice precaution after a power failure. Even a brief loss of power can cause stress for your fish. After a power outage, check to make sure that all of your equipment is functioning properly. In order to have healthy and happy fish, you need to provide them with the proper diet. What you feed them will depend on what type of fish you have. Make sure that you are purchasing the right food for your aquarium.  Make sure not to overfeed your fish. That can cause the tank to become contaminated. Experiment to find the right amount of food. Your fish should eat their fill in about 5 minutes. If it takes them longer than 5 minutes, reduce the amount. If they finish quickly, add more food. Try to feed the fish at the same time each day. Keeping to a schedule will help you keep track of feedings. An important part of keeping your fish healthy is to carefully control the population. When you are increasing the population, it is best to increase your number gradually. Do not add more than 3 fish at a time.  Purchase healthy fish. The best way to do this is to go to a reputable supplier. Read reviews from other customers. Make sure to acclimate new fish. Keep them in their bag for the first 15-20 minutes that they are in the aquarium. If you have had to medicate your fish, take extra precautions to keep the others healthy. Perform water changes more frequently to make sure you get rid of traces of the medication.
A:
Set up a water care schedule. Perform regular maintenance. Feed your fish properly. Create a healthy home for your fish.