Pond Store
Knowing of a good pond store can prevent a lot of headaches. If there is something you need for your pond, you always want to know where you can find it easily. They are also good places to get questions answered.
When you are looking around for a good pond store, try to find one that has been in business for awhile. This way they are more likely to actually be a stable store with a solid clientele base. See what kind of products they carry, and decide if you think it is a good variety. If you are comfortable with the amount of supplies that are available through them, this is a good start.
Another thing to check is how knowledgeable their staff is. Can they answer more than the most basic questions? Does the store carry a good selection of books and magazines that they are willing to refer you to? If you are comfortable store, they are probably a good one to work with.