Pond Boss Forums INTRO Questions & Observations floating algae

David,
Floating algae mats are almost always already dead. Look for different shades of green/yellow/brown colors in the mat. Algae grows quickly, dies quickly, begins its decomposition process and floats into large mats, moving with wind and waves. Treating with algaecides won't help the mats. As a matter of fact, treating with algaecides makes bigger mats, because you kill living algae, which dies, then floats. Microbes assist in the rapid degradation of algal mats. Or, you can rake it out.