[cypher]

I really don't think you'll find half a detolf would be large enough for a Syrian, they really do need a good amount of space, most need at least 100x50cm & with a 12" wheel you wouldn't have the depth for a suitable amount of substrate, even with an 11" wheel it would be too shallow to allow for burrowing & leaving a tank cage without a lid is far too risky, also hamsters have been known to get through the dividers people have made when two are kept in a detolf so tbh I think you would do better to get a separate cage for your new Syrian.