Ecohealth Shower Replacement Filters Particle filters remove sediment & lime scale from the water. Quantity: Pack of four. These Replacement Filters are the essential accessory to the innovative Ecohealth Shower. This pack of four replacement particle filters will help removes any sediment & lime scale from the water. Groomers Expert Tips: Groomers recommend that you change these disposable filters every 3-5 months. Please browse our full Dog Bath range.