What Are the Commonly Used Algaecides for Treating Swimming Pool Water?

Among the many water quality treatment methods, the use of algaecides is an important means of controlling and preventing the growth of algae in swimming pool water. The massive growth of algae not only reduces the clarity of the water body but also makes it less aesthetically pleasing. It can also easily breed bacteria and other harmful organisms, thus endangering the health of swimmers. Therefore, understanding and selecting appropriate algaecides is key to ensuring the hygiene and safety of swimming pool water environments. This article mainly provides an overview of common algaecide agents, discussing their working principles and application methods.

Ⅰ、Commonly Used Algaecides


Using ozone as an algaecide does not require a special setup; it is mainly used for disinfection. In ordinary swimming pools, if ozone sterilization technology is used, and management is strengthened, the growth of algae can be effectively prevented. Ozone has strong oxidizing properties that can destroy the cell structure of algae, thereby controlling algae. However, it should be noted that the use of ozone must be carried out under the guidance of professionals to ensure safety and effectiveness.

2、Copper Sulfate Algaecide

Copper sulfate is a widely used algaecide in China. It is typically added regularly to the circulating water of the swimming pool according to temperature conditions. The dosage should not exceed 1.0mg/L. Copper sulfate kills the spores that produce algae in the pool but has no effect on algae that has already formed.

3、Chlorine Algaecide

Chlorine is a very efficient algaecide. The main components of chlorine algaecide are chlorine or chlorine compounds, such as sodium chloride, sodium hypochlorite, etc. These compounds release active chlorine in water and have strong oxidizing effects. According to relevant information, ensure that free residual chlorine is at 1-3 mg/L, and calculate the required chlorine dosage. Chlorine not only effectively kills algae but also eliminates other microorganisms, ensuring hygienic water quality. However, excessive use of chlorine may cause irritation to human skin and eyes, so the dosage of chlorine needs to be reasonably controlled under professional guidance.

4、Non-Oxidizing Fungicides and Algaecides

Among quaternary ammonium fungicides, geranylamine and neogeranylamine are two commonly used components. Quaternary ammonium salt fungicides are widely used in water treatment due to their good antibacterial and algal inhibitory effects and have the advantage of low toxicity. This means that when used correctly, they are relatively harmless to humans and the environment. Quaternary ammonium fungicides are excellent at destroying microorganisms, especially algae, and can effectively control algae growth in swimming pools, keeping the water clean.

Ⅱ、How to Use Algaecide Correctly

Delivery Cycle and Dosage

Generally, algaecide should be added to the swimming pool 1 to 2 times a month to effectively control algae growth. The dosage of each dose depends on the amount of water. A common ratio is 2 kilograms of algaecide and 4 kilograms of clean water for every 1,000 cubic meters of water.

Killing Existing Algae

If there is algae growth in the swimming pool, it should be treated with disinfectants. Before adding the disinfectant, adjust the pH of the pool to 7.4-7.6 to enhance the sterilization effect. Then follow the instruction manual to ensure maximum effectiveness.

Whether using chlorine-containing algaecide, copper salt algaecide, or other types of algaecide products, they should be selected according to specific water quality conditions and application requirements. At the same time, when using algaecides, it is imperative to strictly abide by the instructions and prevent misuse to ensure the hygiene and safety of the swimming pool.