Axolotl full of sand and now constipated

[Dangercro]

Hey all,

I'm a new owner, I've had my axies for about a week. These were bred in a basement somewhere and lived in shallow Tupperware for months. So when I put them in my tank they both ate sand while rooting around for worms that floated away. I read this was semi normal and it should likely pass... Unfortunately both axolotls still have sand in the gut and the larger one is visibly constipated.
How long should I give them to pass the sand?
And what should my next step be should they fail?

Thanks in advance!

 

[Skudo09]

How big are the axolotls? It should pass hopefully but may take some time. If you haven't already, I would remove the sand at least for now.