Go here first!.
Amy is very knowledgeable. If you are a regular customer she will test your water for free. She then will tell you exactly what you need to do to get your pool running perfectly. I have found her prices to be the best around. I had some difficulty with Central Pools in Framingham. They told me prices for a 20 gage pool lines and told me it was a 25. I called twice to double check what I thought was a great price. Come to find out after driving out there Amy at Northbridge pool had a better price on the liner. Amy really knows what she is talking about! I would recommend Northbridge Pool & Supplies to anyone with a pool.