AlgaGen has pioneered the production of various types of zooxanthellae. The regular use of zooxanthellae will change coral husbandry like no other product on the market! Coral biology defines a relationship between a coral and its population of zooxanthellae. Coral health depends on the presence of zooxanthellae. As a matter of biology, and in addition to stress events, corals will expel their zooxanthellae. 
It just happens. Over time the loss of zooxanthellae will lead to potential washed-out coloration and decreased coral health. By adding AlgaGen PhycoPure™ Zooxanthellae to your tank, you are providing a chance for your corals to reabsorb this critical element and regain color, health, and flourish. We are incredibly excited about this product. 
For years we have been growing and selling zooxanthellae. We have heard stories ranging from stressed M. digitatas rebounding (when treated with zooxanthellae) to entire tanks coloring up. So far, the great reviews keep coming in. Keep in mind that the use of this product does not fix a stress event such as high pH or high Alkalinity, BUT once the stress event is corrected, our PhycoPure™ Zooxanthellae will help to convalesce the damage. There are two clades (families or types) in our bottle.
Refrigerate, shelf life of 4 months