I bought a Coralife 125 skimmer from MD about 45 days ago. It has only been plugged in for about 3 weeks now and it keeps blowing my GFI device that I also bougth from MD. Last night it blew again and this morning I find my dwarf angel dead. I called to see about returning the skimmer to get one I'm more comfortable with having in my tank and they tell me it's to late. I understand it would be to late to just return something because you just change you mind, but a defective device should be a different story. I have spent at least $1500 over the last 6 months with MD, and the only thing I can say at this point is I'm glad there are so many other retailers to choose from in this industry.