Article: The standard measurement is liters. You should be able to figure out how big your tank is when you initially purchase it. But if you don’t know (or don’t remember) the size, you can figure it out on your own mathematically. To find out how many liters your tank is measure the length, width, and height of the tank in centimeters and multiply them together, then divide by 1000. This number is only approximate as the actual value will be rather less due to glass thickness, substrate, decorations, etc. Have the water at the right level to accurately calculate how many fish will fit. If your water levels get too low, your tank won’t be able to sustain as many fish. Typically, you should keep the water level about one inch above the lip of the tank’s water filter. However, this is not always true. A ten inch fish cannot live in a ten gallon tank.  This guideline works best for small community fish like tetras, rainbowfish, platies, etc. Do research on the fish you want to determine what size tank they need. Since the surface of the water is where gaseous exchanges happen that help sustain your fish, it is important to consider this factor when stocking your tank. A larger surface area means more oxygen exchange for the fish in the tank.  A taller tank with the same surface area as a shorter tank isn’t able to house more fish even though it technically holds more water. Typically this is a better rule of thumb to use when deciding how many fish to keep in your tank because it accounts for the oxygen needs of the fish, rather than just the available space in the aquarium.
Question: What is a summary of what this article is about?
Measure your tank. Maintain proper water levels. A common rule is the, one inch of fish per gallon of water rule. Use the surface area rule.
Article: Just relax when you’re talking to a girl. Women like it when a guy is direct; they are not mind readers. Speaking to someone you don’t know can produce a lot of anxiety for some. You can approach someone without opening yourself up to being evaluated. Eventually, you'll be confident enough to talk to them in a normal conversation. Try some of these cues:  Ask a small favor like “can you watch my stuff while I get coffee?” This creates attraction from the person doing the favor. Ask a question. Use whatever situation/location you are in to your advantage. Ask a relevant question like “have you seen this band before?” or “you think Texas could be a country?” Be whimsical if you are feeling it. A great way to prove yourself to a woman is showing her that you not only respect her, but all women. It is too common for guys to view picking up girls as a macho competition instead of wanting to get to know a woman. You can show respect by listening to what she has to say, respecting her personal space, making sure not to interrupt her, and refraining from making statements like “you wouldn’t want to do that, it’s a guy thing.”  Never make fun of a girl when you’re trying to tease them. A little bit of joking is okay, but avoid anything that could be taken as offensive by someone. Generosity also goes a long way. No one likes a guy who is too stingy to have a good time. The same can be said about someone who refuses to give a dollar from time to time. Be a fun person by acting on spontaneity. It is attractive and more interesting to be around someone willing to go on an adventure. This can also show her how interesting you can be. Being silly and having fun also shows you’re confident and not afraid of taking risks. Careful not to be a know-it-all or overly pretentious. Most girls will like a guy who reads from time to time and is interested in the world around him. Put down the video game and pick up a book. Try getting into the habit of reading the news every morning. You’ll have more to add to a conversation when you are on top of current events. Not every girl cares about this. Making someone laugh is a great thing and it is attractive. It is one of the most desirable traits women look for in a man. Don’t modify your humor to appeal to someone in particular. Your natural humor will attract the type of person who you’ll be able to relax around. Laughter affects people on a chemical level. It increases the level of serotonin in our brains which causes our brain's function to work more efficiently. This doesn't always have to do with your looks, but how you think of yourself. Have confidence that you'll achieve your goals. Change your mentality: if you think you're attractive you will be attractive. Thinking positively is the first step, but then to ‘’act’’ positively will increase your self-esteem even more. This can be simple like talking to people in a positive manner and focus your energy into acting this way.  Have ambitions for your life. When you have a serious drive for your life, women will take notice. Change one of your bad habits. Start small like waking up without hitting snooze two or three times or drinking 64 ounces of water a day. Start small and progressively work to improve yourself in larger ways. Do something you’ve been procrastinating. There is no time like the present. It can even be a small thing like cleaning your room.
Question: What is a summary of what this article is about?
Talk to women more often. Practice respect and kindness. Take risks to have fun. Be intellectually curious. Use your sense of humor. Be a confident person.