FISHMATE OR ANY POND FILTER UV WHICH REQUIRES A 9 WATT ELECTRICAL WIREWOUND BALLAST.IF YOU HAVE REPLACED THE UV BULB AND IT IS STILL NOT WORKING,THE BALLAST WILL MOST LIKELY BE AT FAULT.CHEAPER ALTERNATIVE TO REPLACING THE WHOLE ELECTRICAL LID.EASY SELF DIY REPAIR.BALLAST ONLY,GEAR TRAY NOT INCLUDED
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