Honestly, I have had this happens to me nearly weekly, because my wife and I live in the city, we travel to my folks and their big house with an even bigger pool for weekends and when this happens the perverbial S^*T hits the fan.
I have had 3 clowns jump to their death, apparently suicide is truly something to be done alone and not in the presence of your reefkeeper.
I have had sumps drain dry, for some mysterious reason, water evaporates at much higher rate when Im not at home. I think the chiller goes on a sabatical when Im gone swimming.
When I leave for the weekend Murphy moves in, has a pint or 3 or 4 and wrecks havoc on my aquarium.
I come home sometimes and find mysterious streams of dried salt down the front and sides of my aquarium, explain that one?
cheers
D.