Size Your Replacement Bulb
Step 1: Identify your bulb's base to verify that it matches the picture.
Step 2: Locate your bulbs wattage.
Step 3: Measure your bulb end to end (including pins) to confirm which replacement bulb is correct for you.
T5F 4-Pin Base
Here are the replacement parts for 50 Watt UV Bulb - 18.5" Long.
The first step towards effectively treating any pond weed is proper identification. 50 Watt UV Bulb - 18.5" Long is recommended for use against each of the weeds listed below. Click on your desired weed for more information and alternate control options.