Aquastetics in Fall River is hands down the best specialty aquarium store in New England, especially if you're into aquascaping. They're one of the only retailers of ADA, UNS, Tropica, and many other premium over-seas aquarium goods in the area. One of the owners, Nick, is really passionate about spreading the art of aquascaping here in the states and is really knowledgeable about hobby. HUGE selection of rare aquarium plants, hardscape, and fish; they also offer a reasonably priced CO2 tank exchange service for more high-tech planted tanks.