Troubleshooting Coral Issues 珊瑚問題排查指南

Even experienced reef keepers run into coral problems now and then — colors fading, polyps closing, or tissue receding. The key isn’t to panic, but to observe, analyze, and make small, smart adjustments. Most coral issues trace back to three main areas: water quality, lighting, and flow.

1. Water Quality
Poor parameters are often the silent culprit. Check your salinity (1.025–1.026), alkalinity (7–9 dKH), calcium (400–450 ppm), and magnesium (1250–1350 ppm). Sudden swings can cause stress even if the numbers look “normal.” Also, test for nitrate (2–10 ppm) and phosphate (0.02–0.1 ppm) — both too low or too high can lead to bleaching or brown-out.

2. Lighting
Corals depend on consistent light intensity. If colors fade or polyps retract, your PAR might be too low or too high. Use a PAR meter if possible, or adjust your lighting gradually (never change settings suddenly).

3. Water Flow
SPS need strong, random flow, while soft corals prefer gentler, rhythmic movement. If tissue is peeling off, it may be from direct blasting flow or poor circulation creating “dead spots.”

4. Pests and Diseases
If parameters look fine, inspect for pests like flatworms, nudibranchs, or Aiptasia. A coral dip before adding new specimens helps prevent infestations.

Pro Tip:
Always change one variable at a time. Overcorrecting can make things worse. Keep a small logbook — recording changes in lighting, dosing, or coral behavior helps identify long-term patterns and build experience.

即使是有經驗的玩家，也難免會遇到珊瑚狀況——顏色變淡、觸手縮起、甚至組織脫落。這時候千萬別慌，先觀察、再分析，然後逐步調整。大多數問題都可以歸結為三個關鍵因素：水質、光照、水流。

1. 水質問題
水質往往是最容易忽略的兇手。檢查你的 鹽度（1.025–1.026）、鹼度（7–9 dKH）、鈣（400–450 ppm）與鎂（1250–1350 ppm）。就算數值看似正常，若波動太大也會造成壓力。**硝酸鹽（2–10 ppm）與磷酸鹽（0.02–0.1 ppm）**過低或過高，都可能導致珊瑚褪色或變棕。

2. 光照問題
光強不穩會讓珊瑚無法正常行光合作用。若顏色變淡或縮觸手，可能是光太強或太弱。若有 PAR 測量儀最好，若沒有就以「漸進調整」為原則，避免突然改變。

3. 水流問題
SPS 喜歡強而多變的水流，軟體珊瑚則偏好較柔和、有節奏的流動。若珊瑚組織被「吹爛」或邊緣壞死，可能是水流太直接或某些區域缺乏循環。

4. 寄生蟲與病害
若水質與設備都沒問題，就要仔細觀察是否有害生物，例如扁蟲、海蛞蝓或玻璃海葵。新增珊瑚時進行「珊瑚藥浴（Coral Dip）」能有效預防感染。

小建議：
每次只改變一個變數。一次調太多反而更難找出原因。養成紀錄習慣，記下光照設定、水質變化與珊瑚反應，長期下來會成為你最寶貴的經驗資料。