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The Filbur FC-3963 is a compatible replacement for the following pool and spa filters:
All Filbur Pool & Spa Filters also feature Anti-Microbial technology, or Microban Technology, which prevents microbes such as bacteria, mold, fungi and mildew from growing or reproducing. Microban Technology is becoming an industry standard and is featured in all Filbur Brand Pool & Spa filters.
The Filbur FC-3963 product specifications:
The Filbur FC3963 works with hot tubs, pools and spas made by Caldera Spas.
Cleaning your Filbur Pool and Spa Filters