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Can unsightly algae on the collectors be avoided?

April 26, 2017algae avoided collectors unsightly

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Can unsightly algae on the collectors be avoided?

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Yes. Our solar collectors use a solar fluid called propylene glycol — similar to antifreeze — instead of water. Propylene glycol is a more efficient heat transfer agent, it doesn’t freeze, and algae won’t grow in it. And it’s safe and nontoxic.