UV lamps and UV-C sterilizers for ponds
A UV-C lamp for ponds helps limit green water caused by suspended microscopic algae. Installed in a suitable circuit, a UV-C clarifier complements the mechanical and biological filtration of your pond.
Discover our UV-C devices for small ponds, goldfish ponds, koi ponds, and large volumes.
To choose the right model, take into account the water volume, the actual flow rate of your pump, the sunlight, and the fish population. Our sizing guideline is 3 to 4 W of UV-C per m³, prioritizing 4 W/m³ for a very sunny or heavily stocked pond. Always check the manufacturer's recommendations and the device's allowable flow rate.
Do you already have a UV-C device? Check out our replacement bulbs, quartz tubes, and compatible parts.
How to choose a UV lamp for a pond?
- Power: allow at least 3 W of UV-C per m³ of water, more in full sun or with koi. The range covers both small ponds (Pond Clear UV-C 9W) and large volumes (Bitron Eco 240W).
- Lamp type: compact PLs for small and medium ponds (Vitronic, Bitron C), TL and T5 for larger volumes (Pro Clear Ultima, Koi Pro RVS, Power UV-C), amalgam for the highest power (Air-Aqua, Koi Pro Module).
- Installation: in line between the pump and the filter for most models, submerged for Air-Aqua amalgam devices, or for preliminary treatment before a gravity filter (Bitron Gravity, Bitron Premium).
- Flow rate: the water must pass slowly enough in front of the lamp: respect the maximum flow rate indicated on the device's data sheet.
- Maintenance: the bulb loses efficiency over time: plan to replace it every year at the beginning of the season and clean the quartz.
UV-C power guidelines (at least 3 W per m³):
| Pond volume | Minimum power | Device examples |
|---|---|---|
| 3 m³ | 9 W | Pond Clear UV-C 9W, Vitronic 11W |
| 6 m³ | 18 W | Vitronic 18W, UV-C Professional 18W |
| 12 m³ | 36 W | Vitronic 36W, Bitron C 36W |
| 25 m³ | 75 W | Power UV-C 75W, Koi Pro RVS 75W |
These values correspond to the low end of our guideline of 3 to 4 W/m³: for a very sunny or heavily stocked pond, aim rather for 4 W/m³ and respect the manufacturer's flow rate indications.
Frequently Asked Questions
What is a UV lamp for in a pond?
The water passing in front of the UV-C lamp is treated; fine particles clump together and are then retained by the filter. Combined with properly sized filtration and plants, it helps the pond regain clear water: suspended green algae recede when balance is restored.
What UV power for a 10 m³ pond?
At least 30 W of UV-C, and rather 36 W or more if the pond is in full sun or houses koi.
When to change the UV bulb for a pond?
Once a year, preferably in spring when restarting. The bulb continues to light up, but its UV-C radiation decreases with operating hours.
Should the UV be turned off when adding bacteria?
Yes. Turn off the UV-C during bacterial treatment, for the time indicated on the product, to allow the bacteria to settle in the filter.
Where to install the UV-C device?
Most often between the pump and the filter, sheltered and accessible for maintenance. Some models are placed submerged or upstream of a gravity filter: follow the device's manual.
Read: how to choose a UV lamp for a pond, installing a UV lamp, and replacing the bulb or quartz of a UV. See also the UV-C replacement bulbs, the submersible UV devices, and the pond filters.
Experts since 1998. Doubt about sizing? Write to support@foudebassin.com or call +32 10 86 03 54.
* Excludes bulky, heavy or fragile products: they are delivered by a specialist carrier and delivery costs are calculated automatically in the cart.
Filters
Pond Clear 24000 - Complete gravity kit for small ponds - Superfish
2-chamber biological filter with integrated 24 Watt UVC and an energy-efficient PondECO pump for koi and fish ponds up to 24000 litres. Simultan...
View full detailsPond Clear 3000 (solo)
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View full detailsPondoPress Set 5000 - Pressure filtration kit for ponds - Pontec
5.0 / 5.0
3 Reviews
Clear and healthy water guaranteed with the pressurized filter in complete kit for pools up to 2000 litres! This pressurized system allows you to e...
View full detailsPondoPress Set 10000 - Pressure filtration kit for ponds - Pontec
Clear and healthy water guaranteed with the pressurized filter in complete kit for ponds up to 4000 liters! This pressurized system allows you to ...
View full detailsPondoPress Set 15000 - Pressure filtration kit for ponds - Pontec
Clear and healthy water guaranteed with the pressure filter in complete kit for ponds up to 7000 litres! This pressurized system allows you to eas...
View full detailsPondoRell 3000 - Submerged filter with UV for small ponds - Pontec
Ensures clear water and beautiful jets For ponds up to 3000 l without fish / 1500 l with fish Integrated pump for water jet 1000 l/h at 20 watt...
View full detailsAquaForte Filter chambers 12.000 + UV 18 watt
AquaForte introduces a competitively priced filter, featuring a UV-C lamp (PL lamp). The filter comes complete with filtration material (bio ring...
View full detailsAquaForte filter chambers 25.000 +UV 18W
AquaForte introduces a competitively priced filter, featuring a UV-C lamp (PL lamp). The filter comes complete with filtration material (bio ring...
View full detailsAquaForte CBF-4000 Pressure Filter with UV 9W - Up to 3000L
Very easy to use filter with integrated UV This filter can filter up to 3000 liters of water. Simple pressure filters with a backwash functi...
View full detailsAquaForte CBF-12000 pressure filter with UV 18watt
Simple pressure filters with a backwash function for easy maintenance. For complete maintenance, the filter foam must be cleaned by hand. Fitted w...
View full detailsAquaForte CBF-15000 pressure filter with UV 36watt
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View full detailsAquaForte CBF 4000 filter set (UV 9W) + EC 3500 pump
Complete filter kits consisting of AquaForte CBF pressure filter with UV-C, AquaForte EC pump, 10 meter pond hose and 4 hose clamps. CBF-4000 f...
View full detailsAquaForte CBF 8000 filter set (UV 11W) + EC 5000 pump
Complete filter kits consisting of AquaForte CBF pressure filter with UV-C, AquaForte EC pump, 10 meter pond hose and 4 hose clamps. CBF-8000 F...
View full detailsAquaForte Pressurized Filters with UV-C GPF 1,500
FluidraAquaForte Pressurized Filters with UV-C GPF 1,500 Description - Biological filter system to improve water quality and clarity. - UV-C disinfection...
View full detailsAquaForte Pressurized Filters with UV-C GPF 2,500
FluidraAquaForte Pressure Filters with UV-C GPF 2,500 Description - Biological filter system to improve water quality and clarity. - UV-C disinfection fo...
View full detailsAquaForte Pressure Filters with UV-C GPF 5,000
FluidraAquaForte Pressurized Filters with UV-C GPF 5,000 Description - Biological filter system to improve water quality and clarity. - UV-C disinfection...
View full detailsAquaForte Pressurized Filters with UV-C GPF 10,000
FluidraAquaForte Pressurized Filters with UV-C GPF 10,000 Description - Biological filter system to improve water quality and clarity. - UV-C disinfectio...
View full detailsAquaForte Pressurized Filters with UV-C GPF 15,000
FluidraAquaForte Pressure Filters with UV-C GPF 15,000 Description - Biological filter system to improve water quality and clarity. - UV-C disinfection f...
View full detailsAquaForte Pressure Filters with UV-C GPF 20,000
FluidraAquaForte Pressure Filters with UV-C GPF 20,000 Description - Biological filter system to improve water quality and clarity. - UV-C disinfection f...
View full detailsAquaForte Pressurized Filters with UV-C GPF 30,000
FluidraAquaForte GPF 30,000 Pressurised Filters with UV-C Description - Biological filter system to improve water quality and clarity. - UV-C disinfectio...
View full detailsClear Control 75 + UV-C pressure filter + UV-C unit 36 W - Velda
Thanks to the high quality of the materials and the extra-strong lid clamps, this filter can withstand high water pressure. You can select one of s...
View full detailsClear Control 75 Set - Complete filtration system
VeldaFiltration by Velda's Clear Control pressure filter is very effective thanks to the degradation of impurities in suspension in the water, it consti...
View full detailsClear Control 25 Set - Pressure filtration
VeldaSuitable for up to 10,000 liters Color Anthracite Pump flow 5000 l/h Filter content 25 l pump max. recommended 5000 l/h UVC max. recommended...
View full detailsClear Control 50 Set - Pressure Filtration Kit
VeldaFiltration with the Clear Control pressure filter from Velda is very effective thanks to the breakdown of impurities suspended in the water, provid...
View full detailsCross-Flow Biofill Set
VeldaThe Cross-Flow Biofill complete kit is a complete filtration set for ponds up to 10,000 liters of water. Comes with : Cross-Flow Biofill. 18 Wa...
View full detailsGiant Biofill XL Set 60000
VeldaSuitable for up to 60,000 liters Color Anthracite Pump flow 14500 l/h Filter content 210 l pump max. recommended 14500 l/h UVC max. recommen...
View full detailsGiant Biofill XL set 40.000
VeldaIt comes in 3 complete kits for pools up to 20,000, 40,000 or 60,000 liters of water. Giant Biofill XL Set 40000 supplied with: 36 Watt UV-C mod...
View full detailsFloating Combi Filter 2500L
VeldaThe Floating Combi Filter is a floating filter for garden ponds. With a unique design, it has an optimal filtration capacity. Almost invisible, it ...
View full detailsPowerClear® 5000 - "3 in 1": submerged biomechanical filtration with integrated UVC clarifier and fountain pump - Qmax(l/h) 950, 30W, Hmax(m) 1.90, 1/2'', 20 ppi filter foam, UVC PL-S 5W, protection class I, IP68, AC230V/50Hz, adjustment accessories
UbbinkThe PowerClear® 5000 is a complete "3-in-1" filtration solution, ideal for ensuring clear and healthy water in ponds and basins. It combines biomec...
View full detailsPowerClear® 9000 - "3 in 1": submerged biomechanical filtration with integrated UVC clarifier and fountain pump - Qmax(l/h) 1400, 45W, Hmax(m) 2.30, 1/2'', 20 ppi filter foam, UVC PL-S 9W, protection class I, IP68, AC230V/50Hz, accessories included
UbbinkThe PowerClear® 9000 is a submerged filtration system "3 in 1" designed to ensure clear and healthy water in ponds and basins. It combines biomecha...
View full detailsBioPressure® II 3000 PlusSet - Pressure Filter
UbbinkThe BioPressure® II 3000 PlusSet is a complete filtration system designed for small to medium-sized ponds. It combines effective mechanical and bio...
View full detailsBioPressure® II 6000 PlusSet - Pressure Filter
UbbinkThe BioPressure® II 6000 PlusSet is an all-in-one filtration system, designed to ensure clear and healthy water in ponds up to 6,000 liters. This c...
View full detailsBioPressure® II 10000 PlusSet - Pressure Filter
UbbinkThe BioPressure® II 10000 PlusSet is an all-in-one filtration system, designed to ensure clean and healthy water in ponds up to 10,000 liters. This...
View full detailsHeissner Solar Underwater Filter with Fountain Pump 600 l/h – 5W UVC
5.0 / 5.0
1 Review
Keep a small pond clear without an electrical outlet Want to enjoy clearer water without running an electric cable to your pond? This Heissner sola...
View full detailsSMARTLINE Submersible Filter with Pump 1000 L/h – Pond Filtration with 9W UVC Lamp
HeissnerTechnical specifications Model: SMARTLINE Submersible filter with pump Maximum flow rate: 1000 l/h UVC power: 9 W Type: Submerged filter with i...
View full detailsSMARTLINE Submersible Filter with Pump 2000 L/h – Pond Filtration with 11W UVC Lamp
HeissnerTechnical specifications Model: SMARTLINE Submersible filter with pump Maximum flow rate: 2000 l/h UVC power: 11 W Type: Submerged filter with ...
View full detailsPressure Filter with Pump and 7W UVC
HeissnerTechnical specifications Type: Pressure filter with pump UVC Power: 7 W Installation: Above water or buried (depending on configuration) Use: Ou...
View full detailsHeissner Pressure Filter HLF4000-00 with Pump and 7W UV-C Clarifier – Pond Filtration Kit
Technical specifications Brand: Heissner Model: HLF4000-00 Type: Pressure filter with pump Clarifier: UV-C 7 W Recommended capacity: Ponds up ...
View full detailsHeissner Pressure Filter FPU10000-00 with Pump, 11W UV-C and Hose – Complete Pond Filtration Kit
Technical specifications Brand: Heissner Model: FPU10000-00 Type: Pressure filter with pump Clarifier: UV-C 11 W Accessories: Pump and hose in...
View full detailsHeissner Pressure Filter FPU20000-00 with Pump, 24W UV-C and Hose – High-Performance Filtration Kit for Large Pond
Technical specifications Brand: Heissner Model: FPU20000-00 Type: Pressure filter with pump Clarifier: UV-C 24 W Accessories: Pump and hose in...
View full detailsUVC Pump 1000 l/h with Filter and Hose – Compact Pond Filtration System with 9W UVC Lamp
HeissnerTechnical specifications Type: Pump with filter housing and UVC lamp Maximum flow rate: 1000 l/h UVC power: 9 W Accessories: Hose included Use...
View full detailsHeissner Continuous Flow Filter FPU10100-00 with 9W UV-C Clarifier – Efficient Filtration for Pond and Lake
Technical specifications Brand: Heissner Model: FPU10100-00 Type: Continuous flow filter (Durchlauffilter) Clarifier: UV-C 9 W Installation: A...
View full detailsPond Filtration Set 3300 l/h with 18W UV Lamp
HeissnerTechnical specifications Type: Filtration set with pump and UV Maximum flow rate: 3300 l/h UV power: 18 W Use: Outdoor pond Operation: Continuo...
View full detailsHeissner Multi-Chamber Filter 24,000 Liters with 24W UV-C Clarifier
Technical specifications Brand: Heissner Type: Multi-chamber filter (Mehrkammerfilter) Maximum capacity: 24,000 liters (24 m³) Clarifier: UV-C ...
View full detailsContinuous Filtration Kit for Pond 40 m³ – 10,000 l/h with 36W UVC Lamp
HeissnerTechnical specifications Type: Continuous filtration kit for pond Maximum capacity: 40 m³ Recommended flow rate: 10,000 l/h UVC power: 36 W In...
View full details8 m³ flow-through pond filter kit - 1500 l/h - UVC 9 W - Complete kit with pump and clarifier - Heissner
The complete HEISSNER filtration kit, including filter media, is an economical system for ponds up to 8,000 litres without fish (4,000 litres with ...
View full detailsDrum-Filter with UV 40W Amalgam up to 25m³ - Filtreau
The Filtreau drum filter is a pre-filter system that requires little maintenance and guarantees healthy, clear water, without the user having to c...
View full detailsCombi Drum 30000 - All-in-one drum filter up to 30m³ - Koi Pro
4.0 / 5.0
2 Reviews
All-in-one drum filter for Koi ponds up to 30,000 litres. Pumping or gravity option available FEATURES: Available as a pumped or gravity filt...
View full details