The filter screen built in the fish tank is not very good after all. Usually, this kind of filter comes from the finished fish tank, which can satisfy simple filtration, but once the feeding density is high, the filtration effect can't keep up, and because it is integrated, sometimes it can't be changed if you want.
Therefore, it is usually not recommended to buy a fish tank with a filter. It is best to have a separate filter screen, so that the appropriate filtering equipment can be selected according to the situation.