Why do Detroit Fire Stations have koi ponds?

A WDET listener noticed an interesting pattern: several Detroit fire stations have koi ponds. Is it mere coincidence, or is there a deeper reason? Russ McNamara toured some local stations to find out how keeping koi ponds around helps fire fighters relax and go with the flow after stressful situations. 

You've got Detroit questions, we've got answers. CuriosiD is a podcast from WDET, Detroit's NPR Station. Our reporters answer your questions about the region, like "Who invented the Boston Cooler?" or "Are there really salt mines underneath Detroit?" Something puzzling you about Detroit? Ask about it at http://wdet.org/curious and we might answer your question in a future episode!