UV Sterilizers

Aquarium UV sterilizers

A UV sterilizer passes water past an ultraviolet bulb. As a result, it kills free-floating algae and many pathogens. Our aquarium UV sterilizers include complete units, along with replacement bulbs, quartz sleeves and parts.

Using a UV sterilizer

Slower flow through the unit gives a stronger effect. So follow the maker's flow rate for your goal, whether that's clear water or pathogen control.

Replace the bulb about once a year, even if it still lights up. UV output fades over time.

Common questions

Does UV harm good bacteria?

No. The bacteria that matter live on rock and sand, so UV only treats what flows through the unit.