Chaetomorpha Macroalgae (commonly called Chaeto) is one of the most popular and effective macroalgae choices for saltwater aquariums. This fast-growing, string-like algae is widely used in refugiums and algae reactors as a natural way to help maintain excellent water quality by absorbing excess nutrients such as nitrates and phosphates.
Chaeto is a great addition to reef systems because it provides a natural habitat for beneficial microorganisms and tiny pods, including copepods and amphipods, which can become a valuable food source for many reef fish and invertebrates.
Our Chaetomorpha is sold in healthy portions measuring approximately 1–3 inches and is a great starting point for establishing a thriving refugium.
Quick Facts:
– Size: Approximately 1–3″
– Type: Saltwater macroalgae
– Care Level: Easy
– Lighting: Moderate to High refugium lighting
– Growth Rate: Fast under ideal conditions
– Placement: Refugium, algae reactor, or dedicated macroalgae area
– Benefits: Helps reduce nitrates and phosphates naturally
– Reef Safe: Yes
– Additional Benefit: Provides habitat for copepods and other beneficial microfauna
Care Tips:
– Provide adequate lighting and gentle water movement to encourage growth.
– Harvest and remove excess growth regularly to continue nutrient export.
– Avoid adding herbivores that may consume macroalgae if keeping it in a display tank.
Whether you are setting up a new refugium or looking to improve nutrient control naturally, Chaetomorpha Macroalgae is a simple, effective, and reef-friendly addition to a healthy saltwater aquarium.









