Yes, the Tropiquatics store is north of there on main street. It is between Roosevelt and St. Charles road.
Go north on Finley up to Roosevelt, turn left/west and go to the big intersection (white Castle, Jewel). Turn right on main street heading north. You need to go up about a mile, on the right side, it is a little shop half a block north of the Mr Z supermarket. If you see the dairy Queen, you went about 3 blocks too far. They have increased their selection of corals, and they get new fish in every tuesday.