1. Malnutrition: brain corals need special nutrition to grow and be healthy. If your water lacks the nutrients they need, your corals may degum.
2. Insufficient light: brain corals need a certain intensity of light for photosynthesis. If your corals don't get enough light, they may not grow normally, leading to debonding.
3. Water quality problem: brain corals need clean and stable water quality to survive. If your water quality is not good, your coral may get sick or die, leading to deboning.
4. Diseases: Some diseases may lead to deboning of brain coral. Such as calcium deficiency and fungal infection.
If the brain coral is found to be deboned, measures should be taken as soon as possible to solve the problem. Here are some steps that might be useful:
1. Check your water quality: make sure that there are not too many impurities or harmful substances in your water.
2. Check your light: Make sure your coral gets enough light.
3. Provide proper nutrition: Provide proper nutrition according to the needs of your coral.
4. Check your water temperature: Make sure your water temperature meets the needs of corals.
5. Keep clean: Clean corals regularly to prevent diseases.
If you are not sure about the cause of the problem or cannot solve it, please consult a professional.