I have an Apex, pet sitter who has a saltwater tank, whole house generator, and cameras on both the tank and sump. Like others mentioned, having a huge can of RO/DI water for the ATO, as well as running the skimmer to a collection container would help, as well. We don't go on vacation that often, but when we do, it's usually overseas for 2 weeks at a time. I still worry, but not too much.