Chaeto (Chaetomorpha) are some of the most popular macroalgae for good reason. They form dense mat-like colonies that are highly efficient at nutrient control. Their swift, aggressive growth makes them ideal for a refugium or algae scrubber because they can easily become invasive in a main aquarium without constant pruning and grazing.
There are several different species in the genus. Some are less palatable than others however the most popular, Chaetomorpha chaeto, is edible. Chaetomorpha also provides dense hiding places for copepods, fish fry, and other tiny inhabitants. However, be certain to carefully screen new algae purchases as unwanted hitchhikers can find their way into your ecosystem like bristle worms or snails.