The Chaetomorpha algae is one of the best types of algae you can have in your tanks. It removes both nitrates and phosphates. We try It comes in a ball of long filamentous strands and looks a lot like a ball of tangled fishing line. It also creates great habitat for copepods and amphipods. Normally they come with some bugs from our well established tanks. Chaetomorpha will do best in a high light, high flow area. Most of our customers put it in their refugium for filtration purposes.When you order one of our chaeto clusters it is stuffed in a 3 inch bag that is at least 6 inches in length. We try to aquaculture it as much as possible.