ok so im brand new to saltwater tanks, I set mine up roughly 8 months ago, after about 5 months of it running with nothing but saltwater, substrate, and liverock I shut it down because I moved. 3 months later (4 days ago) I set it up again and just the other day i put a small zoanthid in it. we left the house for the rest of the day and when we came back they had closed up, didn't think anything of it, went to bed and woke up and they were still closed, I noticed a sundial snail on one of them so I reached in the water to remove it and HOLLY $#!# was the water hot.. bought a thermometer to get an accurate reading and it was nearly 90 degrees :/ took a whole day to lower it back down to about 78.. did i kill them
trying to add an image of them..
