The two I go to are 'A World of Fish' and 'Something Fishy'. They are both in Richfield, just south of Hwy 62. They are just a couple of blocks from each other. Both stores I would consider OK. But, they are the best saltwater stores I have found overall in the Twin Cities, so far. They are not cheap and the advice is inconsistant depending on who you talk to, at either store. You will find better prices on the internet for sure. I am planning on getting most of my future purchases from the web.
Good Luck,
-Christine