Red Gracilaria Algae
The Red Gracilaria Algae is a dark to light red algae that is a nutritious natural food source for herbivorous fish and invertebrates. Tangs and angels go nuts for this alga, and it will help boost their immune systems. Adding some to a refugium with moderate flow and lighting will allow the Gracilaria to grow, which gives you a constant source to keep your fish happy. They can also be anchored to rockwork and will eventually take root and grow there as well.