RO/DI Water Filters - Where to buy up north?

[f2titan]

Where in the Everett, Marysville, Mt Vernon, and Bellingham area can I buy a good RO/DI filter system for my water changes? I'll take suggestions for the Seattle area too please.

 

[jhampton_wsu]

Where in the Everett, Marysville, Mt Vernon, and Bellingham area can I buy a good RO/DI filter system for my water changes? I'll take suggestions for the Seattle area too please.

Barrier Reef in Renton sells them.