R7WUV-SQ 7 Watt UV Replacement Bulb:AQUATOP 7 Watt UV replacement bulb compatible with the following AQUATOP products:

• FZ7 Canister Filter With UV Sterilization
• PFUV-25 Hang-On Filter With UV Sterilization
• PFUV-40 Hang-On Filter With UV Sterilization
• UV Sterilizing Pump – SP7UV
• UVE Sterilizing Pump – UVE-7

R13WUV-SQ 13 Watt UV Replacement Bulb:AQUATOP 13 Watt UV replacement bulb compatible with the following AQUATOP products:

• FZ13 Canister Filter with UV Sterilizer
• SP13-UV Internal Filter with UV Sterilizer
• UVP-13 Submersible Pump UV Sterilizer
• UVCP-13 Submersible Pump UV Sterilizer
• UVFK-13 Submersible Pond UV Sterilizer with Pump + Fountain Kit
• UV Sterilizing Pump UVE13