[Nokoff]

Quote: Originally Posted by MikeM This is typical of watergardens in summer heat, heavy sun and minimal filtration. It will go away with the change in seasons. Describe your pond, filtration, weekly maintenance routine, and water parameters & folks may be able to give targeted advice.

The pond is an oval, 1,5 m deep in the center and shallows towards the sides. Roughly 6000 liters it is running on a sand filter, ultrazap and bio ball filter. The filter runs 24/7... I'm not sure what other information I can supply as I don't have a test kit for the pond