First of all, I'd like to note that his location has changed. He is located downtown now; give him a call to get the actual address, as I only know it is on 3rd and something.
Secondly, this is the best store to go for fish. Petsmart, Petco? Unhealthy fish. Here are the healthiest and happiest fish around, and he has a huge selection of both saltwater and freshwater fish. Does he not have it? Then he'll order it for you.
He also quarantines sick fish (especially if you bought them from him; he will take care of your purchases), and if you have fish you need to get rid of (too big or what not), he is more than happy to take them.
He's also knowledgeable and very helpful. The other reviews are just false; just TALK to him and he will give you all the advice in the world. You can even call and ask advice; he loves to talk about fish.
Just drop in and you'll see how gorgeous his selection is and how helpful he is. You won't regret going here.