Guppies, as tropical ornamental fish, have specific requirements for water temperature. Here is a comprehensive summary of key points for temperature management:
1. Optimal Temperature Range
Daily care for adult fish: The safe range is 22-28°C, with 24-26°C being ideal for the most vibrant colors and optimal activity levels.
Rearing fry: A slightly higher temperature (24-27°C) is needed to accelerate metabolism and growth.
Breeding period: It is recommended to adjust the temperature to 26-28°C, which can increase the number of offspring and the survival rate of fry.
2. Effects of Abnormal Temperatures
Risks of low temperatures:
Below 20°C, guppies will have reduced appetite and be more susceptible to diseases.
Temperatures below 10°C can be fatal, with 13°C being the survival limit.
Risks of high temperatures:
Exceeding 30°C can lead to oxygen deficiency and reduced activity. Prolonged high temperatures (e.g., 33°C) may cause deformities in fry.
3. Seasonal Management Recommendations
Winter: A heater is required to maintain the water temperature at ≥20°C, and the temperature difference between new and old water during water changes should be ≤2°C.
Summer: Natural water temperatures are usually suitable, but direct sunlight should be avoided to prevent sudden temperature rises.
4. Precautions
The daily temperature fluctuation is recommended to be ≤2°C, as drastic changes can easily cause stress.
Higher temperature stability is required during the breeding period (fluctuation ≤1°C).
With proper temperature control, guppies can display their best condition and live longer.