Just noticed my coral has been getting a brown slime over it and it's been killing it. Does anyone know what it could be? And how to get rid of it?
2. Current lighting & Bulb Age:
2T5 bulbs, one blue, one white
3. Nitrate:
20ppm
4. Calcium:
400
5. Phosphate:
1ppm
6. Alkalinity:
Not sure...