Washington DC area
Mid-Atlantic Koi Club
An active and friendly club for people who are interested in the study and enjoyment of Koi, Goldfish and outdoor ponds.

Pond-Pro Designs
Serving the Baltimore metropolitan area and surrounding communities, Pond-Pro Designs has over ten years of professional and personal experience designing, installing and maintaining quality water features. I've seen Tom's excellent work first hand and highly recommend him.

Hanover Koi Farms
Located in Hanover Pennsylvania, this is a very well run and fun to visit koi farm. we bought several beautiful koi from them in the spring of 2005.
 

Internet Resources
Pond Chat
This is a high traffic message board provided by American Water Gardening Society. The forum members are very friendly and there is a ton of information to be had regarding water gardens.

Koivet.com
Site by a practicing veterinarian and author of two books and a feature-length video on fish health.

The Water Garden
Many articles about pond care and maintenance along with an online shop.

Water Gardening Magazine
The magazine for water gardeners of all ages and experience. Contains feature articles on how to keep your water clear and your fish healthy. It is written by people who know from first-hand experience how to build and maintain a pond.

Pond Calculator
Helps you determine your ponds volume and what size liner and filter to buy. This is provided by PondMarket.com.

Water Gardening CD-Rom
Several pictures of our old pond were used on this CD-Rom created by Nelson/Pade Multimedia.

Blue Ridge Fish Hatchery
We bought our butterfly koi from Blue Ridge at a local koi show in 2001. They are the ones that first bread the butterfly strain.

Affordable Ponds & Gardens
They have excellent prices and their customer service and level of knowledge is outstanding. We highly recommend them.