Breathing is not a Choice — How Safe is your Evaporative Cooler Air?

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Safe Air

Does Your Evaporative Cooler Smell Like a Swamp?

Not all zinc anodes for swamp coolers are created equal.

Understanding what Sunflower Zinc Anodes do and why they should be installed in evaporative coolers.

Evaporative Cooler Air Quality

Indoor Air Pollution Statistics and Expert Opinions

Compare & Contrast SunFlower Zinc Anode with Magnesium Anode Kit

Article in The Business Times of Western Colorado

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Frequently Asked Questions


Compare & Contrast
Sunflower Zinc Anode with Magnesium Anode Kit


1. Both zinc and magnesium anodes control corrosion of the metal pan.


  1. Magnesium anodes have a higher driving voltage than zinc which causes them to be consumed sooner than zinc.
  2. Zinc is an antifungal element. Magnesium is not. Zinc oxide and zinc compounds are indigestible to micro-organisms such as bacteria, mold, and mildew. They cannot grow and multiply if zinc is in their food supply. Zinc anodes control the growth of bacteria, mold, and mildew which cause the “ fishy” or “swampy” smell that is characteristic of evaporative coolers.
  3. Zinc salts (zinc carbonate, zinc sulfate, etc.) settle out in the pan and are less likely to be pumped with the water into the pads; therefore, the pads do not clog up with the white calcium carbonate, calcium sulfate, magnesium carbonate, and magnesium sulfate salts. This prolongs the life of the pads from one year to two or more years.

Compare and Contrast
Sunflower Zinc Anode with Magnesium Anode

Sunflower Zinc Anode
Magnesium Anode
Controls Pan Rust
Controls Pan Rust
Lasts up to 3 years
Lasts up to 1 year
Controls Growth of Bacteria & Mold
Controls the “Fishy Smell”
Extends Cooler Pad Life
Eliminates Need for Chemicals
Reduces Cooler Pad Maintenance
Made in the USA
zinc anode controls bacteria growth
Made in Mexico



Sunflower Anode Manufacturing
124 N. 22nd Court • Grand Junction, CO 81501
888-609-9766 • 970-243-4149

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