My 2 cents...ready...
Tropicorium is definitely worth seeing very impressive been going there since 1991, alot Has changed, they don't give anything away though , but depends what you're looking for, they have a great selection of live rock...they used to wheel and deal but now they seem pretty set in their prices. Worth seeing at least once for sure.
I also used to do the oceans and seas and Greenwoods tour, hilarious! I too am surprised oceans is still open!
Cherry corals is almost all high end corals, Brett and Todd run the businees, If you can- deal with Brett, cool guy very laid back. {Brett@CherryCorals.com}
They did just open a wharehouse style store in livonia after running the business out of their basements They were doing one saturday a month, by appointment only, and there is a waiting room while other guests shop you wait your turn, security reasons or something, If you contact Brett he could give you more details. Got my mystic monti and others there R.I.P.
Cherry Corals is at most of the bigger shows in Detroit, if you're going they can bring something special for you.
Since kee's and the trop are on seperate sides of metro detroit, hard to do on a friday afternoon, personally,I would got to the trop then hit Pet Connection at 5 mile road and middlebelt in Livonia.
Kee's is Ok, but Pet Connection is one of the best stores in Metro Detroit. Great Healthy Fish, Rare frags at great prices Knowledgeable staff- Actually Brett from Cherry Corals used to work there in the early days
Reef Solutions-nice stuff over priced-696 & Van Dyke
moby dick's- don't waste your time
Amazon Stingrays-Great owner pat, but limited stock usually moved into a huge store having a hard time filling it.
Atlantis, right across the street from Amazon's has great fish prices-14 mile west in clawson
Aquarium Shine-used to be Aquatic Discoveries, Lee the owner has hit or miss stock prices average-
If you want more info on detroit stores in particular pm me and i'll tell you what i can...
As far as the border goes= don't get greedy i.e. don't bring a styro full of stuff back, and tell the truth and you won't have any problems, when you shove

oop: under your seat and B.S. them then they have to work do their job

and you get in trouble..... :'(