How to Clean a Cat Drinking Fountain Filter
By Petplanet | Published: 2026-10-19
Category: How-to Guides
Learn the simple steps to clean and replace your cat fountain filter. Keep water fresh, reduce odors, and ensure your cat stays hydrated.
Quick answer
Rinse the filter under cool water weekly and replace it monthly to keep the fountain clean and your cat hydrated. A clogged filter reduces water flow and can harbor bacteria.
Why regular filter cleaning matters
Cat fountains recirculate water, which means debris, hair, and minerals can build up in the filter over time. If the filter becomes clogged, water flow slows down, and the fountain may become noisy or even stop working. A dirty filter can also allow bacteria to grow, which may discourage your cat from drinking.
Cleaning the filter is not the same as replacing it. Rinsing removes loose particles and extends the filter's effectiveness until it needs to be swapped out. Most filters, including the Catit Mini Flower Fountain filters, should be replaced monthly for best results.
What you'll need
You only need a few items: cool running water, a soft brush or cloth (optional), and a replacement filter for the monthly swap. Avoid using soap or detergent on the filter itself, as residues can affect water taste and harm your cat.
Step-by-step guide
- Turn off and unplug the fountain: Always disconnect the fountain from the power source before removing any parts. This prevents damage to the pump and keeps you safe. Never handle the pump or filter while the fountain is plugged in.
- Remove the filter and rinse it: Take out the filter and hold it under cool running water. Gently rub the mesh surface to dislodge hair and debris. Do not use hot water or soap, as heat can damage the filter material and soap residues can be harmful to your cat. Rinsing weekly keeps the filter working well between monthly replacements.
- Clean the fountain basin and pump: While the filter is out, empty the water and wipe down the basin with a soft cloth or sponge. Use a small brush to gently clean the pump inlet if needed. Rinse all parts thoroughly before reassembling. A clean basin prevents biofilm and keeps the water fresh longer.
- Reassemble and refill with fresh water: Place the rinsed filter back into its slot, reassemble the fountain, and fill with cool, fresh water. Plug the fountain back in and check that water flows properly. If water flow seems weak, the filter may need replacement sooner than scheduled.
- Replace the filter monthly: Set a calendar reminder to swap the old filter for a new one every four weeks. Over time, the activated carbon becomes saturated and can no longer absorb impurities. Using a fresh filter keeps the water odor-free and appealing to your cat. Mark the replacement date on your calendar or set a phone reminder so you don't forget.
Product note
- Catit Mini Flower Fountain - 1.5L Replacement Filter - 3 pack: The Catit Mini Flower Fountain filter uses activated carbon to reduce odors and absorb impurities, plus a mesh layer that collects large particles and debris. Activated carbon keeps water tasting fresh, which encourages cats to drink more, while the mesh layer protects the pump from clogging.
Catit Mini Flower Fountain - 1.5L Replacement Filter - 3 pack
