I'm looking at return pumps for my upcoming first tank. One scenario that I would like very much to avoid is flooding the floor of my house. The Reef Octo Varios pumps are attractive because they come with a float valve that will cut the pump off if the sump is flooding. Seems like a great feature, but it comes at price compared to some other options. Is there a way to implement this kind of redundancy if I go with a pump without this feature? What systems do you have in place to prevent flooding? Thanks!