Can I do this (tank ??)

[klongo]

Any thoughts on housing saltwater fish in a tank that used to house a prairie dog?

 

[lions n nd]

check your seals
good luck

 

[klongo]

so if I reseal it, I shouldn't have any other worries?

 

[aaron childs]

Fill it with water, in the morning or a few hours latrer check for leaks ... If there are any, I would just get a new tank personally ... If there is not, clean it very, very well (steralize) ... and you should be fine
HTH