EVOLUTION AQUA EVO 75 WATT UV ELECTRONIC BALLAST IF A REPLACED ULTRA VIOLET BULB IS NOT WORKING,THE BALLAST IS THE MOST PROBABLE CAUSE-EASY DIY REPAIR THE SECOND GENERATION WHICH HAVE A SHORT ER LENGTH BALLAST , IF UNSURE PLEASE CHECK BY SENDING THE MEASUREMENTS OF THE ELECTRICAL BOX , THESE BALLASTS ARE EITHER 230/280/360MM IN LENGTH
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