While all pond weeds and algae can become a nuisance and start to overtake a pond, requiring control, one type of algae is of particular concern, and that is Bluegreen algae. Blue-green algae can occur in a pond due to runoff that carries nitrogen or phosphorus into the pond.
When the temperature reaches 75 degrees or higher, the algae can grow and bloom. A period of hot, sunny days with little win…