Ive had a 55 gallon fresh water tank for about 10 years. After my buddy got a salt water reef tank, i fell in love. I broke down my 55 gallon fresh water & purchased what i thought was a good deal for 110 gallon pre-drilled salt water reef tank fully established from a guy that was sick & could no longer take care of it. I paid 600 dollars for everything, which from researching this was a great deal. Well the day i showed up to break the tank down, the guy got rushed to the hospital in ambulance. Leaving me and my friend in his house breaking this thing apart w/ no idea what im really doing. 15 hours later, i had the tank set up in my home. Everything was going great, until one day i come home & everything looked terrible. Half of my corals looked dead. Rushed a water sample to the fish store & told me the water temp was really high. Go home & temp was 86. Needless to say i had a fish/coral cookout.
So the whole time i was blamming in on my metal halide, come to find out the thermostat readying to heater had pulled out of water. I managed to save one fish out of the whole deal and a few brains, but then a week later my powerhead somehow sucked up my fish and he died.
Needless to say, dont buy used stuff. I think i have replaced everything that orginally came w/ the tank.
Also the first 4 weeks, i was mixing up salt water everyday when the water table dropped in the sump thinking i had to add salt water since it was salt water tank, needless to say i didnt know could top off w/ regular water