The non-photosynthetic reef tank is an interesting concept that has only been achievable in the last several years. The corals were always too difficult to keep alive, but dedicated reef keepers like Matt and a handful of others took the step out onto the limb and found ways to make the tanks successful. The non-photosynthetic corals, as their name suggests, do not obtain their primary nutrition from sunlight.These deeper water corals instead rely on suspended particles and tiny organisms for food. The non-photosynthetic reefs require multiple feedings per day and tend to stay high in excess nutrients like phosphates and nitrates. But the the gorgeous and not-so-common corals found in these tanks makes all of the effort worth while.