The bottom filter fish tank itself can bring part of the air into the water when filtering, so as to maintain the effect of dissolved oxygen in the water body. As long as the fish raised do not have a great demand for oxygen, there is no need to equip a special oxygen pump. If you have a lot of fish, or some large fish with high oxygen consumption, you need to prepare an oxygen pump, which can be opened for 2-4 hours a day.
1. Physical filtration: Physical filtration is the most important filtration method of the filter. By filtering the water in the tank over and over again to remove the impurities in the water, it can become clear. It can discharge the residual bait in the water, fish excrement and body surface secretions, etc., generally placed in the initial place, easy to clean.
2. Chemical filtration: Chemical filtration is not very commonly used in household fish farming. It mainly uses various chemical reagents to improve the water body. The common ones include water quality stabilizers, flocculants, algaecides, protein decomposers, and so on. Among them, the most useful one for household fish farming is algaecide, which can prevent the fish tank from exploding algae.
3. Biological filtration: Biological filtration is carried out by various beneficial bacteria, which can decompose and transform harmful substances in water. Taking commonly used nitrifying bacteria as an example, ammonia nitrogen produced by fecal decomposition can be converted into nitrate, which can avoid fish poisoning.
