Was moving rocks around to make room for some new coral and left my K4's turned on. After 30 mins of getting everything right the way I wanted it. I stepped back and notice an orange flash on the back side of a K4. I get a net and push it out and my flame angel was stuck to the side the whole time. Poor fella didn't make it; had that guy for 2 years. I will always unplug my pumps no matter what I do in the tank going forward. I rarely put my hand in the tank too. :-[