How to Deal with Blue-Green Algae in Aquaculture Water? These Methods Are Very Practical
Anyone who has done pond aquaculture has more or less encountered the situation of excessive blue-green algae reproduction. A large bloom of blue-green algae not only leads to eutrophication of the water body, but also causes the water to become foul and eventually turn into a “dead pond.” So what are the methods for treating blue-green algae in aquaculture water?
1. Why are ponds prone to blue-green algae outbreaks?
During aquaculture, the inability to change the water frequently, raising too many fish and shrimp, and the excessive use of fertilizers all lead to eutrophication of the water body, and eutrophic water is very suitable for blue-green algae growth.
In addition, temperature is also a factor in blue-green algae outbreaks. When the temperature is too high, the growth rate of blue-green algae accelerates noticeably, so more attention should be paid to preventing blue-green algae outbreaks during hot weather.
2. Methods for treating blue-green algae in aquaculture water
1. Ponds with a relatively small water area and a stable water source can have their water changed regularly, and in the early stage of rampant blue-green algae growth, timely replacement with fresh water can also solve the problem;
2. Splashing Bacillus subtilis and sodium humate once about every 10 days can also effectively reduce the reproduction rate of blue-green algae;
3. Culturing some plankton in the water that feed on algae can control the growth of blue-green algae;
4. Adding chemical reagents such as chlorine-containing algicides and copper sulfate can kill the algae.
3. Precautions for aquaculture
1. Aquaculture stocking should not be too dense; excessive density will cause the dissolved oxygen in the water body to decrease, and the farmed aquatic products will also be prone to dying;
2. Change the water frequently, because leftover bait, fish feces, and other substances put in during aquaculture contain nitrogen, phosphorus, and other substances. If fresh water is not replaced in time, it is easy to cause eutrophication of the water body.