This filter is designed to be used with cold plunge models featuring a Pro cooling power. Maintenance: For optimal performance, it's recommended that you replace this filter every 3-4 weeks depending on usage. Compatibility : Our cold plunge systems are exclusively optimized for use with our filters. Using any other brand or model may result in system malfunction. If you have any uncertainties regarding your filter's compatibility, please reach out to us at [email protected] for assistance.