The Evaporative Cooler Scale Preventer Puck is designed to protect evaporative coolers against damaging scale. Just place the puck in the water pan away from the pump and replace every 3 months.
- Citrus boost to help remove any existing limescale
- Polyphosphate slow-release pearls for long lasting protection against limescale
- Lasts up to 3 months
- Proudly made in the USA
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