Need to vent...I got back from vacation yesterday to find out that my 16"+ show quality widebar bar died and my 27"+ silver aro that I grew out from 4".
I knew the person house-sitting for me was not capable of anything more than feeding my fish, so I hired a well known local guy who owns an established tank maintenance company to do weekly water changes for me while I was gone. I even paid him to come by the week before I left so I could show him exactly how I wanted it done. This guy is not some hack. He maintains the display tanks for several high-end seafood restaurants, and is not cheap.
The first time he came, he did the water change and plugged in the pumps, but he never opened the valves. How do you fail to notice that the water is not flowing through the wet-dry?
It's a rookie mistake! 
The oxygen plummeted, ammonia spiked, and I lost 2 of my favorite fishes. From the limited description I received from my house-sitter, I knew that my aro was gone and thought my uro had died as well. As soon as I walked in, I noticed the uro swimming and that my widebar was gone! Lesson learned; sometimes even the best made plans go wrong.
I hope that maintenance guy gave your your money back.
