Application of calcium sulfite dechlorination pellets in aquarium tap water filters

1. Three Major Pain Points in Water Changes for Fishkeeping

Fishkeeping enthusiasts know well that tap water added directly to tanks can pose a fatal threat to fish. According to national standards, the safe residual chlorine level in drinking water for humans is 0.2–1.5 ppm. However, for fish, even levels above 0.02 ppm can damage their mucous membranes, and concentrations over 0.1 ppm may directly lead to the death of sensitive species.
Traditional dechlorination methods, such as aging or sun-exposing water, are time-consuming and labor-intensive—requiring 1–2 days in summer and more than 3 days in winter—and still cannot fully remove combined chlorine compounds. Using purified water long-term can cost hundreds of yuan per month, which is impractical for most.

2. Scientific Analysis of Chlorine Hazards

Residual chlorine harms fish through multiple systemic effects:

• Mucosal Damage: Chlorine destroys the protective mucous layer on gills and body surfaces, making fish more vulnerable to bacterial and viral infections. Studies show that at just 0.05 ppm, epithelial cells on gills begin to swell and secrete mucus abnormally.

• Respiratory Distress: Chlorine binds with hemoglobin to form methemoglobin, reducing oxygen-carrying capacity and causing asphyxiation. In highly chlorinated water, fish exhibit frequent surface gasping and sluggish responses.

• Chronic Poisoning: Long-term exposure to low levels of chlorine can damage the liver and kidneys, reduce immunity, and make fish susceptible to diseases like ich and gill rot.

3. Technological Breakthrough: ETERNAL WORLD Calcium Sulfite Dechlorination Media

ETERNAL WORLD uses food-grade calcium sulfite as the core material, combined with LSR intelligent slow-release technology and a gradient temperature-controlled nano-micropore sintering process, bringing revolutionary advances in aquarium dechlorination:

• Instant Dechlorination: Calcium sulfite reacts with chlorine through a redox process, removing 99% of chlorine within 0.1 seconds. It reduces chlorine concentration from 2 ppm to below 0.01 ppm, fully meeting fish survival requirements.

• Long-Lasting Performance: The special sintering process ensures a stable microporous structure. A single fill can treat up to 2,500 liters of water and lasts 6–12 months—far outlasting traditional materials like activated carbon.

• Dual Purification: When embedded in a PP cotton filter, the dechlorination media not only removes chlorine but also filters out sediment, rust, and algae, achieving a "dual purification" effect.

4. Five Core Advantages for Aquarium Applications

• Safety Assurance: Certified by international standards such as NSF-177, the media operates stably at high temperatures (up to 80°C) and wide pH ranges (4–10) without releasing heavy metals, making it completely safe for fish and aquatic plants.

• Cost-Effective: One gram of high-quality dechlorination media can treat 1 ton of water. Daily cost is less than 0.1 RMB, just 1/20th the cost of using purified water for fishkeeping.

• Easy to Use: No complex equipment required—simply place the media into an existing PP cotton filter cartridge. It’s compatible with over 90% of aquarium filtration systems on the market.

• Wide Compatibility: Safe for sensitive species, including tropical fish, goldfish, and koi.

• Eco-Friendly: Unlike chemical dechlorinators, calcium sulfite produces harmless byproducts like calcium sulfate and calcium chloride, with no secondary pollution and no power consumption.

5. Maintenance Recommendations

• Routine Care: Rinse the filter cartridge with tank water every two weeks to remove surface debris and prevent clogging.

• Replacement: Replace the media every 6 months; if water quality is poor, consider shortening to 4 months.

• Testing: Use residual chlorine test kits regularly to ensure chlorine levels remain below 0.02 ppm.

Final Note:

ETERNAL WORLD’s new dechlorination media redefines aquarium water treatment with its efficiency, safety, and affordability. Whether for home tanks, professional aquaculture, or even drinking water treatment, it delivers chlorine-free, pure water to protect both aquatic life and human health. Say goodbye to tedious water aging and the high costs of purified water—choose ETERNAL WORLD and make fishkeeping easier and more efficient!