Temperature - Saltwater
Water temperature for saltwater tanks is similar to freshwater ranges. The water should be between 75 F to 82 F (24 C - 28 C). Fish will survive for short
periods in temperates between 70 F and 85 F (21 C - 29 C). Low temperatures can cause some bacterial diseases such as saltwater ich to flourish. Temperature variation will cause stress and promote disease, so it's important to have a good
heater or a chiller to keep the temperature stable within the acceptable range.
The decline of coral reefs has been associated with temperature changes of only a couple of degrees. Coral generally turns white and dies under temperature change.