There are three that I go to. Well, actually there is only one that I REALLY frequent to which is in Edmond. The woman that owns it really knows her stuff and she takes a genuine interest in your tank as opposed to selling you something to make numbers. The three places that are around are:
The Reef Shop - Lots of copper in their tanks to keep the fish colorful - problem is that they will sell you a 10 foot long fish and tell you that it is fine for your 6 foot tank...anything to make the sale and they have no interest in your investment once it walks out the door.
Aquarium Concepts - Very thin selection ESPECIALLY with corals and if you get a salesperson named Jessie, turn and walk out the door! That guy is not only annoying but he has prescribed stuff for a couple of people that I know and it has almost wiped out their entire tank.
Aquarium Tropical Fish is the name of the store that I go to. The owners name is Leigh Anne and she is great. Tell her that you and I talked and I sent her to you and let her know what you are looking for. She is the single reason that my tank looks the way it does.
There are a couple of other stores: Clear Concepts (I think) in Norman on Flood Street - Josette's Pets on May - No corals and horrible conditions for her tanks
That is really the lowdown as far as what is out there in the metro OKC area.
Let me know if there is anything else that you have questions on
rich1515@cox.net