This place sets the bar at a high level. I've had an aquarium for over 20 years and I recently moved to the north side and discovered this place. All I can say is that OO Aquarium has some of the healthiest livestock ever seen. My 120 gallon reef tank has never looked so good thanks to all the healthy coral and fish. Unlike many other places, the staff is highly trained and knowledgable about most things. They don't pitch a sales line just to make money, but instead they simply tell you the right thing to do even if it means not selling anything to the customer. They have a really broad range of different species and I strongly recommend this place. Classic!
Pros: Extremely knowledgable, Great Inventory
Cons: No entrance if heading south on Skokie blvd
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