I personally wouldnt trust it, you could go to work and come back and everything be dry/dead. I would get that drained ASAP.
put livestock in a cheaper 90gallon or something until you can get a tank.
I had an african tank once when I lived in an apartment, hardwood floors, vintage building. I came home one afternoon and all water was gone. Tank cracked. I still dont know what happened to the water, my downstairs neighbor never said anything.