For sure! I'm not sure where you're going to be in Tampa, and I'm on the other side of the bay so I only know a few more eastward.
The Coral Coral has already been mentioned by a few people, a great wide selection though I find that their prices for some things can be a little high, but they have these big bins separated by price, really fun to go in and see the variety of corals. A decent selection of fish and inverts as well, I've spent both time and money happily and they have a monthly giveaway.
Fish and Other Ichthy stuff Is a smaller store, but their stock is top quality IMO. Coral selection varies, the fish are all super healthy, and great prices.
In the Largo area there's a place called A Tropical Reef, it's worth a swing through if you know what you're looking for, or call ahead like I do since it's a drive even for me. They've been doing some remodeling but the people who work there are really knowledgeable.
There's a new place I found that's just getting started further south in Clearwater called AJ's Aquariums. The owner is super friendly and gives great deals, and has an Ebay presence, which is how I found him since it saved on shipping to pick up the bids I won. The storefront is new, but he's been selling out of his house for years so it's not like, completely new.
Hope that helps!