1. Petnet believes that it is better to choose the best species for raising fish, rather than lack it. (Good species are different, less fish is better to take care of) 2. Each species must be paired, not a single one. (Not absolute) 3. Feeding must be timed and quantitative, rather less than too much. (Feed once a day in the morning, eager to grab food) 4. Do not make the water in the tank dirty, and the color of the water may be green. (Use good filtration, it is difficult to think the water is dirty) 5. When you see a sick fish, you should stop eating and nourishing. (Look at the disease, the pine scales are almost terminally ill, and the others are still beneficial and recoverable) 6. Unfortunately, the fish died, the whole tank should be washed carefully, and the water should be changed. (Let's see what's wrong, it's not good for the fish to change the water completely) 7. The water should be dried and then replaced. (I use well water, put a cola bottle into the fish tank for one day, and scoop out some to grow flowers) 8. Goldfish are difficult to raise when they are moldy, so you can put a few precious ones in the fish farm. (Use a good filter, it is easy to maintain) 9. Pay attention to the water temperature, so that it is warm in winter and cool in summer. (Let it be) 10. Make sure to see more sunshine, and don't make it gloomy all day long. (It is best to see the sky and not see the sun, usually on the balcony)