Tetra Pond GreenFree UV Clarifier UVC-5 — 5th-Gen Ultraviolet Algae Controller, 15 ft Cord & Adapters

The Tetra Pond GreenFree UV Clarifier UVC-5 uses focused ultraviolet light to neutralize suspended green algae, helping your pond become clear and free of green haze.

Algae blooms can quickly turn a backyard pond into a cloudy, green mess. The GreenFree UVC-5 by Tetra treats algae as water circulates through the unit: single-celled algae are exposed to UV radiation that prevents them from reproducing, allowing your pond filter to remove the spent cells. Built for simplicity and long-term operation, this clarifier is designed to fit many garden-pond setups and includes the components needed for fast installation.

How quickly will the Tetra GreenFree UVC-5 clear my pond?

Visible improvement commonly appears within a week, with heavy algae blooms greatly reduced in roughly eight days under normal flow conditions. Exact timing depends on pond volume, circulation rate, and initial algae load.

• Typical visible clearing often within 7–10 days.
• Works continuously when pump and unit remain powered.
• Effectiveness scales with correct unit size for pond gallons.

What maintenance and parts does this clarifier need?

Maintenance is straightforward: replace the UV bulb each pond season to retain full efficacy and inspect the quartz sleeve for clarity. The unit includes adapters and a long power cord to simplify plumbing and placement.

• Replace bulb annually (bulb may still glow but loses full effectiveness).
• Quartz sleeve and viewing window for quick bulb checks.
• Includes ¾", 1" and 1¼" ID tubing adapters and 15-foot cord.

Which size GreenFree clarifier should I choose for my pond?

Tetra offers four sizes to match different pond capacities, so select the model rated at or above your pond's gallon capacity for best results. Undersized units will struggle with heavy blooms or inadequate flow rates.

• Available for ponds up to 660, 1,800, 4,400, and 8,800 gallons.
• Choose the next higher capacity if you have heavy plantings or dense fish populations.
• Ensure pump flow moves water through the unit as recommended for that size.

Is installation difficult and where can I place it?

Installation is designed to be fast and unobtrusive; the weather-resistant housing conceals the lamp and connects inline with existing pumps or filters. The unit can be positioned in a discreet location near your pump or filter plumbing to keep pond aesthetics intact.

• Installs in minutes with included tubing adapters and standard fittings.
• Durable housing with reflective insert boosts UV exposure efficiency.
• UL Listed and comes with a 3-year limited warranty for added assurance.

Who is this for? The Tetra Pond GreenFree UVC-5 is suited for pond owners who want a low-effort, reliable way to control suspended green algae without frequent chemical treatments. It's a good fit for hobbyists managing ornamental ponds, water gardens, and backyard ecosystems who need a discreet unit that integrates easily with existing filtration and pump systems. Choose the model size that matches your pond volume, plan for an annual bulb replacement, and the clarifier will help maintain clearer, healthier-looking water season after season.