I was given an older electric igloo ice chest that didn't work, and was wondering if anyone had used expanding foam in a can to repair a minner aerator... I want to seal off the cooler vent but don't want to kill the fish...These are the holes I'm Talking about...Name: 20180325_063345.jpg Views: 455 Size: 14.6 KB. Any Ideas. And yes I know it would be simpler to just go buy a new cooler box, but if this can be used then I would rather use it....thanks for reading, and suggesting any ideas.