You really need to put those snakes in their own tanks/tubs. Maybe a 10gal for the little one and a 20long for the other. You never really need anything bigger than a 20L as it is, even for adults.

I know someone else who insists, despite my info against it, on keeping three corns of different age and sex all together in a 29 gal tank 'because she sees they can be kept that way fine in the store'.
It doesn't matter that I tell her stores don't keep their snakes for more than a few months, and most stores don't know jack about snake keeping anyway... she persists in it. Even though the snakes are getting bigger, the smaller one is starting to refuse food (she feeds them in deli cups), and the bigger one is chasing the other two... she just thinks they're playing.

Snakes are not social creatures, with the exception of garter snakes in spring. One tank = one snake. Period. Unless you don't mind all the problems that come with multi-housing such as never knowing who made the sickly looking poo or one snake chasing the other(s) to stress deaths. Extreme examples, I know... but they can happen. Both your snakes should look and act better once you give them their own homes. Good luck!