Besides regularity outside changing water, we cannot do not have a design to filter excellently equipment. It must carry out the following 3 kinds of functions:

1. The pelagian content that gets on surface carries away.

2. It must be contained filter material is qualitative (filter namely cotton) , the bacterium can adhere to above, filter has function of another biology sex again consequently. In aquatic animals box, we discover many bacterium, prepare to will come from fish, aquatic and rudimental alimental to trash is used up or be handled at any time. They supported the system of aquatic animals box, it is to safeguard the main factor with only healthy fish at the same time, be next to local change water.

3. Provide the flow of the water in aquatic animals box or circular function. A lot of fish like the current of the flow of water or light delay, current can complement the supply of the oxygen in aquatic animals box. Nevertheless, the current of circulatory system cannot too strong and apace of the bleb in letting water spills over screen pack. It should be a kind of flow with successive and static Shenyang, the reason is: The flow of bleb is met at the same time expulsive carbon dioxide, and carbon dioxide is the carbon that maintains plant life however kind supply place to need.

One boat is contained filter the small-sized filter of cotton, can choose. Nevertheless, all containing filter of cotton filter small box, need often clean (had better be) of a processing when changing water, because it blocks plug up very easily.

When jamming, the meeting when filter is operated has appearance of bad news oxygen and cannot manage the function of executive boiler circulation. Clean filter when cotton, can use Wen Shui only, and cannot completely abluent or rinse, lest destroy,adhere to above bacterium.

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