Sometimes aquariums will encounter un-expected algae blooms and other events that may jeopardize the health and beauty of your aquarium. These events may be caused by microorganisms such as bacteria, algae, and parasites floating in your water. UV Sterilizers use a special fluorescent lamp that will eradicate and control these free-floating microorganisms as well as disease causing pathogens when water is pumped through the unit. SunSun 9 Watt UV Replacement Bulb compatible with the following products: Canister Filters: SunSun HW-303B, HW-304B, HW-402B, HW-403B, HW-404B, HW-505B, Aquatop CF400UV CF500UV. UV Sterilizers: SunSun JUP-01, CUV-109, Aquatop UVP-9, UVCP-9. Pond Pump: SunSun CUP-609, CUP-129, CUP-359, CUP-3000, CUP-5000, CUP-8000. Also suitable for: Tetra UVC-9, Tetra UV1, Helix Max, Turbo-Twist, GreenFree and JBJ Submariner UV units.

• Replacement bulb for SunSun & Aquatop Canisters, UV Sterilizers and Pond Pumps
• Also works with Tetra, Helix Max, Turbo-Twist, GreenFree and JBJ Submariner UV units
• Average Life Hour: 8,000hrs
• G23 2 Pin Base
• Power: 9 watts