I have mine and no problems (except I dropped the power supply in the water) but I have a replacement PS coming in today. I have had no problems with my SM163 DC skimmer. Exceptional performance for my tank. 3 of my other friends are running the DC skimmers of all sizes and none are having problems.
Actually one friend was running a SM163 on 300 gallons of water and it was keeping up with his extremely heavy bio-load, full blown SPS tank with 30 fish until he upgraded.
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