Boyu · UV clarifier
Submersible UV Steriliser
- UV lamp
- 4–20 W
Knocking out a green water bloom or running in a sump on a larger system.

SunSun · UV clarifier
A submersible UV-C lamp with a built-in timer, from SunSun's Zhizhen line, rated for 1,800 to 2,600 litres. Three sizes, 10 to 14 W.
Updated
Large tanks and sumps with green water.
Keep the lamp shielded and switched off when your hands are in the tank.
| Model | Tank size | UV lamp | Dimensions (L × W × H) |
|---|---|---|---|
| ZUV-10B | up to 1,800 L | 10 W | 31 cm long |
| ZUV-12B | up to 2,200 L | 12 W | 31 cm long |
| ZUV-14B | up to 2,600 L | 14 W | 31 cm long |
Figures from the maker's published specifications. Makers revise products, so check the current figures before buying. Photos supplied by the brand or its distributor.
Boyu · UV clarifier
Knocking out a green water bloom or running in a sump on a larger system.
Eheim · UV clarifier
Planted tanks prone to green water, or anyone wanting a bit of extra clarity and pathogen control.
Eheim · UV clarifier
Larger planted tanks where you want UV only for set hours, or want it tied into an Eheim digital setup.
Oase · UV clarifier
Canister-filtered tanks prone to green water, or keepers who want an extra safeguard against outbreaks.
Quick answers about the SunSun ZUV Timer UV-C Lamp, drawn from its specs.
The maker rates it by model: ZUV-10B up to 1,800 L, ZUV-12B up to 2,200 L, ZUV-14B up to 2,600 L.
Large tanks and sumps with green water.
Keep the lamp shielded and switched off when your hands are in the tank.
Other uv & sterilisers worth comparing: Boyu Submersible UV Steriliser, Eheim reeflexUV, Eheim reeflexUV+e. Add any of them to the compare table to see the specs side by side.