The most common lake weed problem is Filamentous Algae. Filamentous Algae, also called “lake moss” or “pond scum”, form dense mats of strands. Filamentous Algae is often a persistent problem because it reproduces rapidly by fragments, spores and cell division. Abundance is dependent on nutrient levels, particularly phosphorous, in the water. High levels of nutrients result in increased amounts of algae.
Its presence can degrade water quality and recreational enjoyment.
An alum treatment consists of applying liquid alum (aluminum sulfate) below the surface of the water from a boat. When the alum meets the water, it turns into a non-toxic substance, or floc, called aluminum hydroxide. As the floc settles, it binds to phosphorus in the water and also forms a barrier on the bottom sediments that prevents phosphorus from being consumed by algae. The alum treatment is expected to be effective at reducing phosphorus in the Lake for several years.
Applying the correct amount of chemical is crucial to successfully controlling algae. All product labels provide dosage or application rates, often as pounds or gallons per acre-foot of water.
Timing of chemical applications is another important consideration. Some algae species can reach nuisance levels in cold water just after ice-out.
Old timers, young bucks, whipper snappers and country bumpkins alike are welcome to come be a part of the GSA community.
