The Pond Guy UltraUV Pond Water Clarifier — 13W EPA-Registered UV Light, Vortex Flow for Fast Green-Water Removal

If your pond or water garden turns green from microscopic planktonic algae, the UltraUV gives you a targeted, chemical-free way to clear water. The unit pairs a 13-watt UV-C bulb with a vortex flow chamber so every gallon receives multiple passes of germicidal light before returning to the pond. It’s designed to work with a properly sized pump and can be installed inline with existing plumbing or used in combination with mechanical and biological filtration.

How quickly will I see clearer water?

The UltraUV can produce noticeable improvement within 48 hours, depending on algae density and pump flow rate. Because the device destroys free-floating algae as water passes the UV source, clarity increases as more water cycles through the unit.

• Visible reduction in green tint often within two days
• Faster results with correct pump sizing and steady circulation
• Repeated circulation continues to polish water over several weeks

How does the vortex chamber improve performance?

Rather than a straight-through path, the UltraUV’s vortex chamber routes incoming water around the bulb multiple times so each volume receives greater UV exposure. That increases contact time without requiring a larger bulb, improving efficiency and clarity.

• Multiple passes around the lamp for extended UV contact
• Compact design preserves flow while maximizing exposure
• Durable housing built for continuous outdoor use

What size pump and setup do I need for this 13-watt unit?

UV clarifiers require a pump that provides appropriate flow for the unit’s wattage; undersized or oversized flows can reduce effectiveness. Match your pump to manufacturer flow recommendations and install the UltraUV inline so water is directed through the vortex chamber before re-entering the pond or filter.

• Use a pump sized to the UltraUV’s flow specifications for best results
• Install inline or after mechanical filtration for clearer outlet water
• Check lamp condition and replace bulb per service interval to maintain performance

Is the UltraUV safe and legally registered?

The UltraUV is an EPA-registered piece of equipment for treating small pond algae issues without algaecide chemicals. UV clarifiers mechanically deactivate planktonic algae through ultraviolet radiation in a contained chamber; follow safety and installation instructions supplied by the manufacturer.

• EPA-registered for pond algae control
• Non-chemical treatment method that targets free-floating algae
• Requires proper handling when servicing the UV bulb

Who is this for: The Pond Guy UltraUV 13W Pond Water Clarifier is best for pond owners and hobbyists with small to medium water gardens experiencing green water from planktonic algae. It’s suitable for people who want a chemical-free solution that integrates with existing pumps and filtration systems, and for those willing to maintain proper pump sizing and occasional bulb replacement to keep the system effective.