I'm from Palmer MA.....here are my 2 favorite LFS
1. Exotic Fish and Pet World, Southampton MA
These guys used to be in Hadley, but a couple years back moved. They went from 25 minutes to 45 minutes away from my house, but they're worth the drive. They have a very good fish selection and a very friendly and knowledgeable staff.
2. School of Fish, Springfield MA
Their staff is a little more hit and miss, but they have a very nice selection of fish and tank decorations.