The effectiveness of a UV sterilizer or clarifier depends on how long the water in your aquarium is exposed to the UV bulb. This exposure time is controlled by the flow rate—the speed at which water passes over the bulb.
Slower flow: Water spends more time near the UV bulb, allowing for more thorough sterilization.
Faster flow: Water passes too quickly, reducing the bulb’s effectiveness.
Proper flow rate ensures that the UV system can effectively control free-floating algae (green water), bacteria, and parasites. Depending on your goals, you may need to adjust the flow rate to achieve the desired level of sterilization.
Depending on the reason you are using a UV System, you may need to increase or decrease your flow rate as this will determine to what level it sterilises. If the rate is too fast, the bulb will not have the time to actually clean and sterilise any possible components that may reside within the water column.
FAQ: Why Does a UV Sterilizer Have a Maximum Flow Rate?
Q: What does the flow rate do?
The flow rate controls how fast water passes over the UV bulb. The slower the water flows, the more time it spends near the bulb, which allows it to be sterilized more effectively.
Q: What happens if the flow is too fast?
If water moves too quickly, the UV light won’t have enough time to kill algae, bacteria, or parasites. This can make the sterilizer less effective.
Q: How can I adjust it?
Some systems let you control the flow rate. Adjust it depending on your goal—slower for maximum sterilization, faster if less treatment is needed.
Tip: Proper flow ensures your UV sterilizer keeps water clear, healthy, and free from unwanted microorganisms.