1, the fish pond area is relatively large, so it is not good to keep warm with heat preservation lamps, and the cost is also high.

2. If it is a precious fish species, it can be heated by laying floor heating or heater.

3. The common method is to move to indoor small fish ponds and use heating or constant temperature devices.

Attention: Oxygen should be replenished in time in a constant temperature or heated fish pond, otherwise it may lead to hypoxia and death.