Update : New Tank !!
This is an update to my last post. Grain (Brown one) and Salt (grey one) has gotten an upgrade, unfortunately when I had gotten them I thought their old cage which use to house a dwarf hamster was big enough. I quickly learnt that the pet smart employee who agreed that the cage was big enough and totally not trying to sell these two guys quickly. After a while and research... I finally got them a new one. (Pain in the ass to get up to my apartment during the winter time. I hate Canada sometimes). But, they got a 55 gallon which they absolutely love as they are running around and adventuring.
As well, as getting a new tank. They also got new accessories and a bigger wheel for them. I'm currently using aspen and half their fluff from their old bedding. Which I had packed down, so as they dig it will expand.
If there are any suggestions on things they should be added, let me know. As I'm always up to listening!