I don't use either of them, Hooksett is small but tanks look good, got my Pajamas from there and they are around 2 YO now. Manchester is larger but have had issues with their fish in the past. Bought a DOgface from there and he poisoned my tank and killed my old fish. Had a 17YO blue Damsel and a 5-6YO Marine betta that died. Shame on me for not using a QT, lesson learned. Fish Mike's in Manchester is decent and Mike is very helpful. Went to Jay's Aquatics in Salem yesterday and he has a very large selection of corals and was very helpful. I have heard on BostonReefersclub.org that he has had issues sometimes with hitchhikers. Someone said to dip anything from him but I don't know as I haven't bought any livestock from there. Bill's in Manchester seems a little dirty to me. I have been there twice and each time the tanks look like crap and the employee was sitting at the desk not working on anything. This is no way to keep a business.There is a small LFS in Raymond that I have had good luck with in the past and she will order me anything I might need or want, tanks are decent but only a few of them. Got my tang from her a year or two ago and he is doing great.
DON"T go to Aqua Addicts in Hooksett. The guy was rude and no help WHATSOEVER when I visited him at his old location in Salem. If you google the store there are 3 reviews and 2 of them are bad, 1 is mine lol.