Macroalgae is a fantastic way to eliminate nitrates easily and naturally. Due to the reduced nitrates available, nuisance algae is starved out and will naturally be reduced. Macro Algae can be housed inside or outside of the display tank. Stem plants like brushes, halimedia & mermaid fans are great options for in tank macro algaes. Red Grape Macroalgae also works great as it will attach to rock & grows lush and beautiful.
Algae like chaeto or grape caulerpa are best kept in a separate system which has its own light source. These type of plants can be very invasive quickly and can smother slower growing corals if removal is not part f your weekly maintenance plan.
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