How to Descale a Cat Water Fountain

In hard-water areas, white mineral scale builds up on fountain surfaces and inside the pump over time. Here’s how to keep it in check.

Why scale forms

Hard water is high in dissolved minerals. As water evaporates, those minerals are left behind as chalky deposits — most visible around the waterline and outlets.

Light, regular cleaning first

The easiest approach is prevention: wipe surfaces during your weekly clean before deposits harden. Fresh water and routine cleaning slow scale dramatically.

Tackling existing scale

For established deposits, follow your fountain model’s guidance on safe descaling methods. Manufacturers specify what’s safe for the pump and any coated or steel surfaces — stick to their advice rather than harsh improvised solutions.

Protecting the pump

Scale inside the pump makes it work harder and noisier. Keeping up with cleaning, and descaling per your manual when needed, keeps it running smoothly.