A chain of green scum was seen floating through Portland on Election Day. The substance was spotted on the Willamette ...

If a pond is leaking, it needs to be drained ... Grow sufficient numbers of plants so that their floating leaves cover more than 50 per cent of the water surface. The addition of oxygenating ...

Blanket weed can be a pest ... any creatures can crawl back in the water. Prevent your pond from icing over completely in winter by floating a tennis ball on the surface. Remove it to leave ...