New to the Boston area and working to set back up ...

New to the Boston area and working to set back up my 120gallon reef tank. I stopped in to check out this store and staff seemed nice and several people stopped to asked if I had questions or needed any help. Lots of fish fresh and salt but I was concerned by several salt tanks being full of what looked to be small white worms all over the walls of the tanks. I m not sure what they were but clearly a infestation of some kind. If they can get the tanks cleaned up I think this store has great potential.