The Coospider koi pond ultraviolet filter inactivates algae DNA by destroying it with specific wavelengths. Its core equipment uses 254-nanometer ultraviolet lamps with a radiation intensity of 95,000µW/cm². When covering 5,000 gallons (18,927 liters) of water, the algae inactivation efficiency is as high as 99.7%. The 2023 test by the American Water Quality Association shows that the irradiation dose threshold for Chlorella at this wavelength is 80,000µW·s/cm² – when water flows through the quartz sleeve at 800 gallons per hour (3,028 liters per hour), the algae cells can be exposed for 1.5 seconds to break the DNA double strands. Compress the algal density from 500,000 cells per milliliter to less than 5,000 within 72 hours.
The hydrodynamic design determines the actual performance. The flow velocity inside the equipment needs to be maintained in a laminar state (Reynolds number < 2300). For every 10% increase in turbulence deviation, the algae removal rate decreases by 12%. The optimization formula for pipe diameter and flow rate of the Coospider RP-35 model is:
Flow rate (gallons per hour) ≤ tube power (watts) × 28
For example, the 35-watt model corresponds to a maximum flow rate of 980 gallons per hour. In a 5,000-gallon pond, the daily water circulation treatment rate reaches 47%, stabilizing the chlorophyll A concentration below 2μg/L (the standard for clear water is < 10μg/L).
Anti-attenuation technology ensures continuous effectiveness. The high-purity quartz sleeve (with a SiO₂ purity of 99.99%) maintains a 93% ultraviolet transmittance and enhances the algaecidal efficiency by 33% compared to ordinary glass (with a transmittance of 70%). The titanium alloy heat dissipation base keeps the lamp tube temperature at 45℃±3℃, avoiding the problem that the light attenuation rate surges by 7% for every 5℃ increase in an environment above 40℃. In the 2023 Florida high-temperature test, this design enabled the device to maintain 92% of its initial light intensity after continuous operation for 120 days, and the algae inhibition period lasted for up to 90 days.
The collaborative filtering system enhances ecological benefits. The pre-80-micron mechanical filtration module captures 90% of suspended solids with a particle size greater than 100μm, preventing particles from blocking ultraviolet rays. Experimental data show that for every 5 units increase in the turbidity (NTU) of unfiltered water, the ultraviolet transmittance decreases by 18%. At the Tokyo Koi Fair, the Koi Pond UV Filters system with accompanying filtration demonstrated stability with an annual NTU value of less than 3, saving 65% of algae control costs compared to a single chemical treatment.
The energy consumption economy has a market advantage. The 35-watt model consumes 0.84 kilowatt-hours of electricity per day (operating for 24 hours), with an annual electricity bill of approximately 31 US dollars (0.1 US dollars per kilowatt-hour), saving an average of 210 US dollars annually compared to chemical algaecides. Within a five-year equipment life cycle, the frequency of lamp tube replacement has been extended from the industry average of 12 months to 18 months (light attenuation rate < 15% per year), and the maintenance cost has been reduced by 40%. The drought response case in California further demonstrates its water-saving value: In 2022, the evaporation recharge volume of koi ponds using this system decreased by 38%, and the water resource recycling rate increased to 92%.