Is someone watching your tank for while you are away? The one thing that I have now is a wifi camera watching my sump. It's a Wyze Cam really good camera cost $27 for the one I have watching my sump and I have two other ones watching my front and back door. Those one that moves and cost $37. I totally forgot my story when I went away for a week, but I did have a person come feed the fish and cats every other day. I lost power 3 day into the week protein skimmer and return pump went off and never came back on. I didn't think of this scenario would happen so the person didn't think anything was wrong. Came back saw that my level was low in my display tank. A bubble film on the surface and temp was at 72 degrees (thank God it was the summer time) no fish or coral lost. Now the only thing I need not to go out is my wifi and I can watch my sump,turn off/on return pump and protein skimmer.