Motorised ballvalves

[FishOkay]

Having a Sump to handle the water when the power shuts down I would think is the logical fix. Can't you lower the level in the sump to give you the extra room.

That's true, but I feel like in 21st century reefing with all its modern tech. Motorised valves should be a thing definitely. For manifolds or returns or overflows, even if its just for the lazy people who don't want to bend down and manually isolate a valve.