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Bennettsbaitball
From the replies @Bennettsbaitball 6mos

Water rains or drips down a screen that has a refugium light shining on it. Algae grows on that . So no algae in main tank . Also wil helpl raise ph which helps coral growth. And also removes nitrates and phosphate to almost zero levels.

BenTownsend593
From the replies @BenTownsend593 1yr

I love the macro algae! Definitely an under appreciated aspect of saltwater. Nice pictures as well

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