In the field of factory-based recirculating water aquaculture, the biological filter can be regarded as the "heart" of the entire system, undertaking the crucial mission of purifying water quality and maintaining the ecological balance of water bodies. Today, let's delve into the components and basic principles of biological filters together!

There are various farming models for yellow eels, mainly including pond cage farming and integrated rice-eel farming, among which pond cage farming is currently the most important farming model. However, with the expansion of the breeding scale and the increase in density, the problem of diseases has become increasingly prominent, becoming the main bottleneck restricting the sustainable development of the eel breeding industry.

The "feeding state" of fish is the most direct health barometer in the breeding process, but it is often overlooked by farmers. From being healthy to falling ill, a fish often shows obvious abnormal changes in its eating behavior.

Aquaculture professionals all know that water quality indicators are very important! So every day we keep a close eye on parameters such as ammonia nitrogen, sub-salts, pH and dissolved oxygen. But apart from these, there is another "invisible big shot" that is often overlooked, and that is - alkalinity

From May to August every year, the three words that Pelteobagrus fulvidraco farmers fear hearing the most are - ascites disease! This disease, known as the "fishpond plague", can cause the mortality rate of fish to soar to 80%, and even lead to the total destruction of the entire pond!

In the factory-based recirculating water aquaculture system, the purification efficiency of water quality directly determines the aquaculture density, disease prevention and control, and economic benefits. In this sophisticated water circulation system, there is an "invisible guardian" that works silently all the time, and that is - the biological filler.

In the battlefield of aquaculture, solid particulate matter is the number one "invisible killer"! They not only make the water murky like mud soup, but also cause a sharp drop in dissolved oxygen, a proliferation of pathogenic bacteria, and even illness and death of fish and shrimp.

In May, the weather across the country warmed up rapidly, and aquaculture entered the peak production season. However, it was also accompanied by changeable weather, alternating sunny and rainy days, fluctuating temperatures, and large temperature differences between day and night... May is also a high-incidence period for aquatic diseases!

California bass has become a popular species in freshwater farming due to its delicious meat, fast growth and high economic value. But to keep them "well cared for", daily management is a big deal!

The mandarin fish, with its delicious meat and rich nutrition, is known as the "gold of water". However, the mortality rate of mandarin fish during the juvenile stage is often as high as 50% to 70%, causing heavy losses to countless farmers.