Protein skimmer

[Charlie_11278]

I'm planning on adding a skimmer to my sump but my concern is power outage and overflowing. I ran multiple "power outage " test where I flip the power strip to off and it leaves about a 1 inch and a half gap to where it needs to be to spill. I was thinking if I add a skimmer designed for a nano cube but I doubt it'll skim anything.

Question: is there a skimmer where water doesn't return when powered off?

 

[Pellikan]

I don't think you need worry about it. Most the water in the top portion of a working skimmer is highly aerated so it's mostly air up there. Your water level in the sump will barely rise. An inch+ should be enough to handle it.

 

[davocean]

I agree it should not be an issue, but that is a pretty high level.
Have you raised your return lines as high as they can be for the earliest siphon break?