How FishLife Pond Services helps protect ponds during warm and hot weather Warm weather can be beautiful for pond owners. Fish are more active, plants are growing, and the pond becomes a real feature of the garden or landscape. But hot weather also brings one of the most serious risks to pond health: oxygen depletion. When oxygen levels drop too low, fish can become stressed very quickly. In severe cases, oxygen depletion can lead to sudden fish losses, sometimes overnight or