OK I know that can't climb much, but I'm worried about them being able to climb the little distance I have in the sterilite's I got. The tubs are 35gal tubs- I'm setting up 2 and will have ~1k in each. My question is- with how little room there is from the tops of the egg flats to the top of the tub- should I put on some vaseline to play it safe for escapees?