Without routine care, your fish will die prematurely. Remember, a fish can't tell you when it is hungry or when its water is dirty. In order to maximize your fish's lifespan, you will need to give it regular care. By created a schedule for yourself, you can help yourself to stick to it. Feed your fish regularly. It is important to select food that is appropriate for your fish. Many stores sell food specifically for bettas, but even then it is important to check the ingredients. Avoid food made mostly of fish meal.  Many bettas do not like fish flakes. Pellets specially formulated for bettas can be found in most fish stores. Freeze-dried or frozen fish food, such as blood worms or brine shrimp, are a great supplement to their diet of betta pellets. Choose live food if you can. Research demonstrates that formulated food, such as the dry fish food you get in the store, begins to have measurable impacts on a betta's health once it exceeds 25% of their diet. Few pet bettas are privileged enough to get live food all the time. Though live food can be expensive and time consuming, it also greatly benefits a betta's health. Buy a time-release feeder for your fish if you go on vacation, so it doesn't die of starvation while you're away. Every so often, you will have to change the water for your fish. This varies depending on the size of the tank, whether or not you choose to use a filter, and if you incorporate live plants. You can buy testing kits to check the water. This will ensure that your fish has a clean, healthy medium to live in, maximizing his life-span potential. A fish tank can grow algae on the sides that need to be cleaned off, in order to ensure the quality of the water and also your clear view of the fish. The rocks or sand at the bottom of your tank will also need to be cleaned or replaced every once and a while. Waste buildup in the base of the tank can make your fish sick, and kill him. Filters can help with this, but, even then, it may be necessary to siphon waste from the bottom.  Buy a siphon, so...

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Write a summary of the previous text in Vietnamese:
Lên lịch chăm sóc cá theo thông lệ. Cho cá ăn đúng cách. Làm sạch nước. Làm vệ sinh bể cá. Chơi với cá.