HOZELOCK POND ECO POWER (16860000)OR ANY POND FILTER WHICH REQUIRES A WIREWOUND ELECTRICAL BALLAST UP TO 18 WATTS 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 ALSO BRANDED ECO POWER 10000 MODEL
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