i was gone overnight at my parents house and i come back to a crashed tank :angryfire:. i don't have a auto top off system so i made sure i topped of the tank good so it will be only a liitle evaporated when i come back. well when i arrived home the tank was a lot evaorated. so my salinity was sky high. i should have tested it to see how high it was but i was more worried about adding fresh water to the tank to get the salinity back up to where it is suppose to be. but i think it was probably up at 1.030. and my temeperature was also at 50 degress :uhoh:. which that is very cold as you may all know. i always keep my tank temperature at 79-80. i immediately turned on the heat up at my house. and the tank got back to 79 degress in a matter of a couple of hours. the next day i found my ammonia to be at .50. i was looking to find the resolution why and i seen that there was nothing to my acans left. so i immediately took the acans out of the tank. i also seen that a lot of mucus was coming out of the corals. so i did a 30% water change to get the ammonia down. so after i did the water change i tested the tank for ammonia and it was at 0. day 3 after the crash and the all my corals are still shriveled up :angryfire:. i checked all my parameters and everything is fine. do i just have to give the corals time to get back to being healthy? now i know a tank is like a baby you can't leave it alone for long unattended