For about a month or so my clown has been sick. My tank prameters where all fine. The only problem I noticed was I started getting a lot of algae. I got a Chocolate chip starfish to help and couple of snail. They did not help. I have had some snails in the past and I think that my hermit crabs are eating them. So first I am looking for some other ways of controlling the algae. The clown fish looked healthy most of the time and his behavior was well. The only thing I noticed was in the morning he was floating facing down. In the beginning I thought he was sleeping or what ever they do at night. But he would take longer and longer to get moving around. Once he did he was fine. So yesterday I got from work and I noticed something was very wrong, all the fish were near the bottom of the tank. After closer inpection I found the tank to be about 100 degrees. My heater failed to shut off. The all fish died but the clown survived. He is still showing the same symptoms but he floats more often then swims. Last night I did do a 50% water change to help reduce the temperature and decided not to put him in a rescue tank cause he is the only one left. So any thoughts on the clown as far as anything I can do to save him? And any thoughts on controlling the algae? I am going to the fish store tonight or tommorrow to replace the heater and figure I would hold of on getting any new critters till the clown situation is taken care of but I still need to figure out the algae situaiton.