colorful solid oxygen ball

There is an old saying in China, says, "Every year have enough thing to spend, or year by year enough." From of old, people see fish as mascot, so there are a lot of people like fish feeding and fish appreciating. However, the old ways of fish feeding is complicated, comparatively speaking, for you need to buy the tools, the container, change water, feed them and clean the container and so on. There are so many things need to deal with, so it makes a lot of people keep away from fish feeding. Now, with the rapid development of technique, a new kind of product is coming into our daily life, that is the solid oxygen ball.