House is getting fumagated, what to do with tank?

You will never achieve the seal required to prevent the permeation of the pest control chemicals.

You will also have a challenge changing enough water in-which will detoxify the water to a point it will not negatively effect anything.

I am sorry

 

Hey Pack. I've known folks to run the skimmer airline outside, turn out the lights, throw a tarp over it and duck tape it to their wood floor. It may not keep 100% out, but his tank survived. Mostly a softy tank with some LPS.

You could run the tube through a window opening and tape it up to keep the house sealed. It's not under pressure, duct tape should hold. I'd point it out to apartment mgmt though.

Hope it's not too late.