Everything was doing great in my tank. Even the heat was no problem as I got a chiller earlier this year when I upgraded my lighting. I had to go into Edmonton for a day, which streached into two days. Shouldn't have been a problem. I get home and immediately know there was a problem. My house stinks like you wouldn't believe. Somehow my return pump jammed and I had no flow to my sump and chiller. My 75 gallon tank is under 660 watts of Mh lights and is directly in a full sun window. My temp was 115F. Everything is dead. Snails, crabs, fish, shrimp, brittle stars, tiger tail cuke, beautiful corals, seba anemone, and 6 incredible 6-8 inch premium clams. The water was like rotten fish soup, and has finally cleared after 3 days. It even looks like my coraline algae is bleaching. I am just sick. I never had a problem with that pump untill now and it is right when I am gone for 2 days and the hottest days of the year. It seems that Murphy's Law holds true.
Marcel