Tetra Pond Green Free 36 watt UV Clarifier Replacement Bulb  Part#  19529
Helps keep your pond free from unwanted algae growth.
Lamps will last up to 11 month or 9000 hours 
 
*Note* - These bulb only fit Tetra UV Clarifiers manufactured in 2011 or later.
Compatible Unit - Tetra Pond UV Clarifier 36 watt