Hi, JACustomer. I have been a Veterinary Nurse for over 15 years and I'm happy to help. Please stand by while I have a chance to type.
I'm terribly sorry to hear that Zero and Jack have you concerned.
First, let us discuss the sand. Sand is a very high-risk substrate for reptiles as it can accidentally be ingested and cause gastric impaction. I strongly recommend using either no substrate at all in their swimming tank or using rocks large enough that they won't fit inside of their mouths.
I don't see an age listed on these two, so if they are kept together and they are adults, we need to be concerned about breeding. Kicking up substrate can be done in an effort to find a place to lay eggs. If either of them are wild-caught, they may have come to you gravid.
I'd like to help further, expanding on what you may be seeing, but it would help me greatly to have a few photos of their habitat and more details on their age. Can you supply this in your reply?
It has been my honor to assist you today, I hope this information has been helpful as I take a great deal of pride in my work. I will be standing by if you have any questions I did not address, please feel free to reply and I will respond further. If this has helped you for the time being but you need more assistance in the near future, I’m just a message away :)
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