Description
xThis TetraPond replacement UV bulb restores ultraviolet clarifier performance to control suspended green algae in ponds up to 8,800 gallons.
If your TetraPond GreenFree UV Clarifier has been running a season or more, the lamp inside may still glow but no longer deliver the UV intensity needed to stop nuisance algae. This genuine Tetra replacement bulb is engineered to match the UV3 and UVC-36 units and provides high-efficiency ultraviolet output rated for roughly 8,000 hours of continuous operation — about 11 months. Installing a fresh lamp each pond season keeps the clarifier operating as designed, so suspended algae lose their ability to reproduce and are removed by your pond’s filtration system.
How long will this replacement bulb keep my pond clear?
The bulb is rated for approximately 8,000 hours of continuous use, which equates to a full season under typical backyard pond operation. After that time the bulb’s UV intensity drops even if it still emits light, reducing its ability to control single-celled algae effectively. Replacing the lamp annually ensures consistent performance and helps prevent recurring green water.
- Rated life: ~8,000 hours (about 11 months continuous)
- Recommended change: once every pond season
- Effect: restores UV intensity for algae control
Will this bulb fit my UV3 or UVC-36 unit?
This genuine Tetra bulb is made specifically for TetraPond GreenFree models UV3 and UVC-36, so it matches the originals in size and output. Installation is straightforward — most users replace the lamp during seasonal maintenance and check operation through the clarifier’s viewing window. Always disconnect power before handling the bulb and follow the clarifier’s manual for safe replacement steps.
- Compatibility: Designed for UV3 and UVC-36 units
- Form factor: direct replacement for original TetraPond lamp
- Safety: power off and follow unit instructions when changing
How effective is ultraviolet clarification for algae control?
Ultraviolet clarification focuses on suspended single-celled green algae by exposing them to UV light inside the clarifier. The exposure prevents algae from reproducing, allowing the filtration system to capture and remove the dead cells, which rapidly clears green water when the system is sized properly. Results can be seen within days for heavy blooms and remain effective when the lamp is maintained yearly.
- Action: UV disrupts algae reproductive ability
- Outcome: dead algae clump and pass to filters for removal
- Timing: heavy blooms often improve in about a week
Who is this replacement bulb for? Pond owners using a TetraPond GreenFree UV clarifier who want reliable seasonal maintenance will benefit most. It’s intended for hobbyists and professionals with ponds up to about 8,800 gallons who need a straightforward, OEM-compatible lamp to restore clarifier performance. If you run a TetraPond UV3 or UVC-36 and aim to minimize green water with a proven seasonal swap, this 35-watt TetraPond replacement bulb is the correct, easy-to-install option.
FAQ
Q: How often should I replace this TetraPond UV bulb?
A: Replace it every pond season — roughly every 8,000 hours (about 11 months continuous) for effective algae control.
Q: Is this bulb compatible with UV3 and UVC-36 units?
A: Yes. This genuine TetraPond replacement is made to fit UV3 and UVC-36 clarifiers as a direct replacement.
Delivery & Returns
xFree UK delivery on every order — packed within 1 business day, arriving in 2–4 business days.
Free 30-day returns — email us for a prepaid label; refunds land within 3–5 business days of the return arriving.
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Care & Good To Know
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