Probably too late on this one, but ....
There are no stores up in Bay City (Been wanting to open one though
There is a decent one in Saginaw on Tittabawasse Rd just East of I-675 called Aquatic Gardens.
Midland has one called Pier 701 That is on Haley a couple blocks east of Business US-10 that runs through town.
Both are decent, but over priced. The staff is usually pretty helpful. Pier 701 has a better and more healthy livestock, but are often higher priced. Both only carry softies.
Sadly, these two are about all that is available out this way ...