How to place the filter material of the post-filter fish tank?

In the first stage, the biochemical cotton should be placed with appropriate pore size, high strength and high elasticity.

The second stage is to place water purification stones;

The third stage, placing yellow coal or water grass sand; The biochemical balls are placed in the fourth stage, with large capacity, and there are as many biochemical balls as possible, but drip filtration is used as far as possible.

In the chemical filtration stage, chemical adsorbents such as activated carbon, oxygen-absorbing stone, zeolite and clear water resin are placed for filtration. Generally, the adsorption effect of this filtration is only three months, so it must be changed.

Extended data:

When choosing a fish tank, you should also be equipped with various equipment. The purpose of buying a fish tank filter is to keep the water quality of the fish tank, to make the fish live longer, and to see colorful fish when watching.

First of all, the water in the aquarium is easy to be turbid, mainly because it is stagnant water, plus fish excrement and some bait, which will lead to poor water quality. With this filtration system, the water quality will change and the aquarium will become more perfect. The principle of fish tank reverse filtration is to filter the water through the filter to make the water quality clearer.