"Good" Algae Combats the Bad
Add a few of these intriguing, aesthetic plants to your marine aquarium, and watch your setup come alive with color, better water quality, and content inhabitants.
In the simplest terms, macroalgae are large-celled, photosynthetic algae. Available in several varieties, they are a valuable addition to a saltwater aquarium, as they:
Though specific needs may vary slightly from species to species, in general, to successfully keep macroalgae, provide good water conditions and bright (high) lighting conditions.
"Algae filters" have become popular in recent years because they offer a natural approach to filtering water. An algae filter or "scrubber," is simply one or more types of macroalgae grown in a sump or refugium below a main aquarium or in a side-mounted refugium. An established scrubber can help remove pollutants from the main aquarium, so undesirable species of algae will not grow. Many aquarists also use their macroalgae sump or refugium for live sand, live rock, and for raising amphipods and copepods found in live rock.
For best results, give your scrubber 18-24 hours of light daily. This extended photoperiod allows the macroalgae ample time to convert carbon dioxide into oxygen. If dark periods are too long, macroalgae uses most of the available oxygen and releases excess carbon dioxide, resulting in a pH decline. Prune and remove excessive growth from your scrubber on a regular basis.