{"id":12,"date":"2026-07-16T16:13:00","date_gmt":"2026-07-16T14:13:00","guid":{"rendered":"https:\/\/whiskergear.com\/en\/?p=12"},"modified":"2026-07-16T19:11:08","modified_gmt":"2026-07-16T19:11:08","slug":"how-often-change-cat-fountain-filter","status":"publish","type":"post","link":"https:\/\/whiskergear.com\/en\/how-often-change-cat-fountain-filter\/","title":{"rendered":"How Often Should You Change a Cat Fountain Filter?"},"content":{"rendered":"<div style=\"border-left:4px solid #f0a500;background:#fff8e6;padding:12px 16px;margin:0 0 24px;border-radius:6px;font-size:.95em\"><strong>Disclosure:<\/strong> this article has affiliate links. If you buy through them, we earn a small commission at no extra cost to you.<\/div>\n<p>You bought the fountain, but nobody explained the part that matters most: the filter needs upkeep. Skip it and the water ends up worse than a plain bowl. Here is the right schedule and the mistakes almost everyone makes.<\/p>\n<h2>How often to change the filter<\/h2>\n<p>The general rule is every 2 to 4 weeks. Shorten it to 2 weeks if you have several cats, a long-haired cat, or hard water where you live.<\/p>\n<h2>The 5 most common mistakes<\/h2>\n<ul>\n<li><strong>Never cleaning the pump.<\/strong> Gunk and slime build up, the fountain gets loud, and one day it quits. Clean the pump every time you change the filter.<\/li>\n<li><strong>Letting the water run too low.<\/strong> A dry-running pump burns out. Keep it topped up.<\/li>\n<li><strong>Washing a new filter with soap.<\/strong> Do not. Just rinse it under running water.<\/li>\n<li><strong>Skipping the descale.<\/strong> Every month or two, soak the parts in diluted vinegar to clear mineral scale.<\/li>\n<li><strong>Buying the wrong replacement filter.<\/strong> Check the model. One reason we pick carefully in our <a href=\"\/en\/best-cat-water-fountains\/\">best fountains list<\/a> is easy filter availability.<\/li>\n<\/ul>\n<h2>FAQ<\/h2>\n<h3>Can I run the fountain without a filter?<\/h3>\n<p>Not a good idea. The filter catches hair and debris and improves the taste, which is what keeps your cat coming back.<\/p>\n<h3>Can the pump stay on 24\/7?<\/h3>\n<p>Yes, it is built for it and uses very little power. Just keep the water level up.<\/p>\n<p><em>Still choosing a model? Start with our <a href=\"\/en\/how-to-get-cat-to-drink-more-water\/\">hydration guide<\/a> or read our <a href=\"\/en\/petlibro-cat-fountain-review\/\">PETLIBRO review<\/a>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Disclosure: this article has affiliate links. 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