Here are some of the LFSs I recently toured between NJ and MD that are worth visiting:
Fish Hut in Saddle Brook NNJ (lot of Africans but not much CA/SA),
Absolutely Fish in Clifton, NNJ (Good selection of African and CA/SA, store is small so the selection is limited),
Shark Aquarium in Hillside, NNJ (lot of CA/SA and oddball rare fish),
Aquarium Paradize in Belleville, NNJ(not a big store but must see for if you are interested in odd ball, FH and CA/SA),
Aquarium Center in Blackwood, SNJ (big store with good selection of African, CA and SA and the best price in the northeast)
Hidden Reef in Levittown, PA (big store with salt and cichlids, but lighly populated so selection is limited )
House of Tropical in Glenn burnie in (Baltimore) MD (Big store with huge selection of Africans and CA/SA including big full grown fish)
Giant Aquarium in South Philly (Asian store with high grade parrot, FH, odd ball and arrowana)
Captain Nemo's in Norristown, PA (not as good as with former management, but still has some good selection)
ThatPetPlace retail store in Lancaster, PA (big store with good selection and occasional rare find)