When to Change Filter By Billy Khieng | January 08, 2024 Learn when to change your filter for your Cold Stoic Classic VIEW ALL POSTS Caret How to Use Your Maintenance Items? Learn how to use your Renu Therapy maintenance items. X How to Maintain Your Chiller Learn how to maintain the chiller on your Cold Stoic Classic. X How to Maintain Your Deck Proper maintenance of the deck will help ensure the durability of your Cold Stoic Classic through all seasons. X