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How to care for Cynarina Donut Coral in Reef Tank

Find out how to properly care for your new Cynarina Coral with this "how-to" guide on the requirements for healthy Cynarina Coral

Read along to find out the Lighting, Water Flow, Feeding, Placement & more when it comes to the care of your new Cynarina Coral

by scott Shiles • February 24, 2023

Corals, LPS Coral Care

Cynarina donut coral, also known as doughnut coral or button coral, is a popular species of LPS (Large Polyp Stony) coral in the reef-keeping hobby. It is loved for its unique appearance and colorful patterns, which make it an excellent addition to any reef tank. However, like any other living organism, Cynarina donut coral requires specific care and attention to thrive in an aquarium environment. In this blog, we'll discuss the necessary steps to care for Cynarina donut coral in your reef tank.

Water Quality:

Maintaining good water quality is the most crucial aspect of caring for Cynarina donut coral. The water parameters should be stable and within the following ranges: pH 8.1-8.4, salinity 1.023-1.025, alkalinity 8-12 dKH, calcium 380-420 ppm, and magnesium 1200-1350 ppm. Weekly water changes of 10-20% can help maintain stable water parameters.


Cynarina donut coral requires moderate to high lighting levels to thrive. The recommended PAR (Photosynthetically Active Radiation) for Cynarina donut coral is between 100-250. It's important to acclimate the coral to new lighting gradually to prevent it from experiencing photodamage.


Cynarina donut coral prefers moderate water flow, which will help it filter nutrients and debris from its surface. Place the coral in a spot with moderate water flow, ensuring it's not receiving too much or too little flow.


While Cynarina donut coral can obtain nutrients from photosynthesis, it also requires supplemental feeding. Feed the coral small pieces of meaty foods like mysis shrimp or brine shrimp once or twice a week. Do not overfeed, as this can lead to poor water quality and other problems.


Cynarina donut coral requires adequate space to expand and contract. Avoid placing the coral too close to other corals or the tank's glass walls, as this can lead to abrasions and tissue damage. Also, ensure that the coral is not in direct contact with the substrate or rocks, as this can cause damage to the coral's underside.


Observing the coral's behavior and appearance regularly can help detect and prevent any problems. Check for any signs of tissue recession, discoloration, or unusual behavior, as these could indicate a problem with the coral's health. If any problems arise, take action immediately to prevent further damage.

In conclusion, caring for Cynarina donut coral requires attention to water quality, lighting, flow, feeding, placement, and observation. With proper care and attention, Cynarina donut coral can thrive in a reef tank, adding beauty and diversity to your aquatic ecosystem.

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