Back in the late 80's early 90's, I struggled with keeping corals alive. Fish thrived, but corals withered away. I also at the time was breeding and selling 2 types of freshwater fish, guppies (fancy) and cory cats to the LFS. The problems was basically a money pit with salt water tank, it came to an end when I was given an offer for my fish. The information availible now leads me to believe my issue then was lighting. But I'm back in it, armed with better info thanks to R2R and the internet.